In-depth


Find out about this rare cause of heart attack in young, healthy people.

Twisting the knee can cause a common knee injury known as a torn meniscus. Treatment sometimes includes surgery.

Acanthosis nigricans

Acanthosis nigricans: Treating underlying disorders may improve skin condition

ACL injury

An active life that includes sports may also include the risk of a torn ACL. Reduce your risk, and know when to get treatment.

Acute coronary syndrome

Acute coronary syndrome occurs when there isn't enough blood flowing through your heart. It can be felt as chest pain (angina) or a heart attack.

Acute lymphocytic leukemia

Acute lymphocytic leukemia is a type of leukemia that affects immature white blood cells. It's the most common cancer in children and adolescents.

Adult Still's disease

Daily fevers, achy joints and an intermittent, salmon-pink rash may be an indication that you have a rare inflammatory disorder called adult Still's disease.

Ambiguous genitalia

Ambiguous genitalia is a condition in which a newborn's external genitals don't appear clearly male or female.

Anal cancer

Though anal cancer is rare, incidence of anal cancer is increasing. Find out the symptoms and causes of cancer of the anal canal.

Ankylosing spondylitis

Ankylosing spondylitis is an inflammatory arthritis that affects your spine and nearby joints. Over time, your spine may become stiff and immovable.

Anorexia nervosa

Find out what's behind this life-threatening eating disorder and how to treat it.

Ascariasis

Ascariasis is a common type of roundworm infection found worldwide. It's spread by poor hygiene and improper sanitation. Infections are effectively treated with medication.

Asthma

Asthma occurs when the main air passages of the lungs become inflamed, causing wheezing and difficulty breathing. Knowing warning signs can help you manage this chronic condition.

Atrial septal defect

Atrial septal defect (ASD) is an abnormal opening between the heart's upper pumping chambers. It's common and readily treated.

Avascular necrosis

Loss of blood flow to a bone leads to avascular necrosis — the death of bone tissue. This most commonly affects the thighbone, causing groin pain.

Back pain

Back pain is a common reason for health care visits and missed work. Home treatment and proper body mechanics can help you feel better.

Bed-wetting

Bell's palsy

Bell's palsy occurs when an impaired nerve results in facial weakness or paralysis. Most people experience a full recovery.

Bird flu (avian influenza)

Bladder stones

Bladder stones are small masses of minerals in your bladder — often forming as a result of an enlarged prostate, nerve damage or infection.

Blastocystis hominis infection

A microscopic parasite causes Blastocystis hominis infection. Experts disagree as to whether this infection causes diarrhea and other associated signs and symptoms.

Blind loop syndrome

Blind loop syndrome occurs when a portion of bowel is bypassed. The condition is most often a complication of abdominal surgery.

Bone cancer

Bone cancer is an uncommon type of cancer that begins in a bone. It can affect both adults and children.

Bone metastasis

Bone metastasis occurs when cancer spreads to the bones.

Bone spurs

Bone spurs can sometimes interfere with joint function or press on nerves.

Broken ankle/broken foot

Broken arm

Broken arm? If your arm hurts too much to use normally, seek prompt medical care.

Broken collarbone

A broken collarbone, a common bone fracture during childhood and adolescence, can typically be treated with ice, pain relievers, a sling and physical therapy.

Broken leg

Broken leg — Comprehensive overview covers symptoms, diagnosis and treatment of this type of fracture.

Broken ribs

A broken rib, or fractured rib, is a common injury that occurs when one of the bones in your rib cage breaks or cracks.

Brucellosis

Brucellosis is an infectious disease that spreads from animals to people, mainly via unpasteurized dairy products. Travelers should take special care to avoid infection.

Bulimia nervosa

Bulimia often leads to a secret life of shame. Find out what's behind this life-threatening disease and how to treat it.

Bunions

A bunion can create pain and pressure at the base of your big toe. Wearing roomier shoes can provide relief.

Cancer

Learn about cancer, what it looks like and what causes it.

Carcinoid tumors

Carcinoid tumors are rare, slow-growing cancerous tumors that most often occur in the gastrointestinal tract or in the lungs.

Carpal tunnel syndrome

Carpal tunnel syndrome is caused by compression of the nerve running through your wrist. Treatment can provide relief.

Cavities/tooth decay

Take cavities and tooth decay seriously. Brushing, sealants and avoiding certain foods are important ways to prevent cavities, toothache pain and tooth loss.

Cervical cancer

Cervical cancer is a common and often preventable reproductive cancer. Find out what cervical cancer is and how it's treated.

Cervical spondylosis

Cervical spondylosis is a chronic degeneration of the bones and disks of the neck, most likely caused by aging and wear and tear.

Chondromalacia patella

Chondromalacia patella is a knee condition that plagues many runners. It's often caused by overuse or injury.

Chronic constipation

Chronic constipation can cause bloating and abdominal discomfort.

Chronic cough

More than an annoyance, a chronic cough can significantly affect your quality of life. Find out how it's diagnosed and treated.

Chronic exertional compartment syndrome

Don't ignore exercise-related pain, pressure or numbness, because it may indicate chronic exertional compartment syndrome. Proper treatment can get you back to your favorite sport.

Chronic pelvic pain in women

Chronic pelvic pain is pain in your pelvic region — the area below your bellybutton and between your hips — that lasts six months or longer.

Churg-Strauss syndrome

Churg-Strauss syndrome is a rare disorder marked by blood vessel inflammation that affects organs throughout the body. Asthma is the most common sign.

Clubfoot

Clubfoot is a treatable birth defect in which the foot twists awkwardly at the ankle. Untreated, an awkward gait and other problems may result.

Colon cancer

Colon cancer and rectal cancer combined are the second-leading cause of cancer-related deaths in the United States. Regular screening tests can help reduce your risk.

Complex regional pain syndrome

Complex regional pain syndrome is a chronic, painful disease that typically affects an arm or leg that was recently injured or infected.

Constipation in children

Constipation in children is common. Often, simple changes in diet and routine are helpful.

Conversion disorder

Conversion disorder occurs when your response to stress shows up as seizures, paralysis or another physical symptom.

Craniosynostosis

Craniosynostosis is a birth defect in which one or more of the bony plates of a baby's skull fuse prematurely, misshaping the head.

Croup

The barking cough of croup can be scary. But it's usually not serious and gets better with rest and fluids.

Cystic fibrosis

Earlier detection and better treatments have improved the outlook for people with cystic fibrosis.

Cystitis

Cystitis is an inflammation of the urinary bladder. It's most often caused by a bacterial infection but may have other causes.

Diffuse idiopathic skeletal hyperostosis (DISH)

DISH most often occurs in the spine, but it can affect other joints in your body. Get the basics on this condition.

Dislocated elbow

Dislocated elbow — Comprehensive overview covers symptoms, causes, treatments of this common elbow injury.

Dislocated shoulder

Dislocation

A blow to your joint can dislocate the bones that meet at that joint. Don't try popping them back into place yourself. Get medical help.

Dry socket

Dry socket, a painful complication of tooth extraction, results from improper healing of the surgical wound.

Dysphagia

Encopresis

Encopresis occurs when a child resists having bowel movements, causing stool to collect in the colon and rectum. Leakage of liquid stool also is common.

Endometrial cancer

Endometrial cancer is one of the most common cancers in women. If detected early, this cancer is often successfully treated.

Enlarged spleen

An enlarged spleen is usually a sign of an underlying problem. Treatment varies, depending on what's causing the enlargement.

Epiglottitis

Epiglottitis occurs when the small "lid" above your windpipe swells, blocking the flow of air into your lungs. Emergency care can prevent life-threatening complications.

Esophageal cancer

Reduce your risk of esophageal cancer by eating more fruits and vegetables.

Esophageal spasms

Esophageal spasms are irregular contractions of the esophageal muscles, which impair the movement of food to the stomach.

Fever

Don't be in a hurry to treat a low-grade fever — it's probably helping your body fight infection. High or lasting fevers may need medical attention.

Flatfeet

Many people are born with flatfeet; others experience fallen arches. Custom-designed shoe inserts can support your arches and prevent complications.

Foot drop

Frozen shoulder

Frozen shoulder, also known as adhesive capsulitis, is a condition characterized by stiffness, pain and limited motion in the shoulder joint.

Ganglion cyst

Ganglion cysts are noncancerous fluid-filled lumps (cysts) that sometimes develop in the tendons or joints of the wrist, hand or foot.

GERD

Glomerulonephritis

Glomerulonephritis affects your kidneys' filtering function. Complications include high blood pressure, protein in the urine (proteinuria) and kidney failure.

Golfer's elbow

The pain of golfer's elbow doesn't have to keep you off the course. Here's how to get back into the swing of things.

Greenstick fractures

The extra flexibility of children's bones makes them more prone to greenstick fractures — an injury in which a bone bends and cracks.

Growing pains

The term "growing pains" may be a misnomer because there's no evidence that growth hurts. Still, the nighttime leg pain is real for many kids.

Growth plate fractures

Growth plate fractures can interfere with your child's normal bone growth, resulting in a stunted or twisted limb. Prompt, proper care is essential.

Hamstring injury

Hamstring injury — Comprehensive overview covers symptoms, treatments, self-care, prevention of this leg muscle injury.

Herniated disk

Back pain may mean you have a herniated disk — but not always. In fact, you can have disk herniation without pain. Here are the facts.

Hip fracture

A hip fracture is a serious injury, potentially life-threatening. But many people are able to make a good recovery.

Hirschsprung's disease

Hirschsprung's disease, a disease of the colon, is present at birth and can cause serious problems passing stool.

Hodgkin's lymphoma

Impacted wisdom teeth

Impacted wisdom teeth don't have room to emerge or grow normally. Learn about dental problems related to impacted wisdom teeth and your treatment options.

Indigestion

Indigestion can ruin meals and make you feel uncomfortable. Take steps to prevent symptoms like upset stomach, bloating and pain.

Infant reflux

Spit up happens. Often, changes in feeding technique help keep reflux under control.

Inflammatory breast cancer

Inflammatory breast cancer occurs when cancer cells clog lymphatic vessels in the skin of the breast. It's a rare but deadly form of cancer.

Intestinal obstruction

Intestinal obstruction — a serious condition that requires prompt medical attention — occurs when a blockage of the intestine prevents food or fluid from passing through.

Intussusception

A rare but serious disorder, intussusception occurs when one part of the intestine slides into an adjacent part, often causing intestinal obstruction.

Invasive lobular carcinoma

Invasive lobular carcinoma is a form of breast cancer that develops in a milk-producing lobule of breast tissue.

Iritis

Iritis is inflammation that affects the colored area of your eye called the iris. This serious condition can affect your vision if left untreated.

Juvenile rheumatoid arthritis

Kidney cancer

When kidney cancer is diagnosed and treated early, the chances for recovery are better.

Knee bursitis

Knee pain

Find out what could cause knee pain.

Legg-Calve-Perthes disease

Legg-Calve-Perthes disease is a rare childhood hip condition that requires specialty care.

Lung cancer

Smoking increases your risk of lung cancer. Quit now and reduce your risk.

Male breast cancer

For male breast cancer, awareness and early diagnosis are key to successful treatment.

Meningitis

Fever, headache and stiff neck are common signs and symptoms of meningitis — an infection of the membranes and fluid surrounding the brain and spinal cord.

Meralgia paresthetica

Meralgia paresthetica — the result of a compressed sensory nerve — is characterized by tingling, numbness and burning pain in your outer thigh.

Monoclonal gammopathy of undetermined significance

Monoclonal gammopathy of undetermined significance often isn't serious, but it can increase your risk of certain diseases, including some types of cancer.

Morton's neuroma

Morton's neuroma is a growth of nerve tissue in your foot that may be caused by pressure or irritation. It can be painful.

Mouth cancer

Mouth cancer includes cancer that occurs in the mouth or on the lips.

Nasopharyngeal carcinoma

Nasopharyngeal carcinoma is rare in the United States but more common in some other parts of the world.

Neck pain

Although often eased with simple techniques at home, neck pain can sometimes be a symptom of a more serious problem requiring medical treatment.

Neuroblastoma

Neuroblastoma most commonly affects children age 5 and younger. It's the most common form of cancer in babies.

Neurofibromatosis

Neurofibromatosis — Comprehensive overview covers symptoms, diagnosis and treatment of this genetic disorder.

Non-Hodgkin's lymphoma

Non-Hodgkin's lymphoma is cancer originating in the lymphatic system. It's caused by abnormal white blood cells, and often the only sign is swollen lymph nodes.

Osgood-Schlatter disease

Osgood-Schlatter disease can cause pain, swelling and tenderness below the kneecap. This common condition often affects young athletes involved in running, jumping and bending activities.

Osteoarthritis

Osteochondritis dissecans

Osteochondritis dissecans occurs when a piece of and bone loosens and separates from the bone.

Osteomyelitis

Osteomyelitis is a bone infection that commonly affects the long bones in the arms and legs in children, and the spine and pelvis in adults.

Paget's disease of bone

Your bones are made up of living tissue that's continually being renewed. Paget's disease of bone disrupts that process, sometimes causing serious complications.

Paget's disease of the breast

Paget's disease of the breast is a form of breast cancer that involves the nipple. Understand treatment options for this rare breast cancer.

Patellar tendinitis

Don't let the common term "jumper's knee" fool you. Patellar tendinitis can affect anyone — no matter how frequently or infrequently you jump.

Peptic ulcer

Peptic ulcers are painful sores that commonly affect the lining of your stomach and upper small intestine. The most frequent cause is a treatable infection.

Peritonitis

Peritonitis is an infection of the membrane that lines your inner abdominal wall and covers the organs within your abdomen (peritoneum).

Plantar fasciitis

Plantar fasciitis is a common cause of heel pain. It generally clears up with the help of simple treatments for pain and inflammation.

Posterior cruciate ligament injury

Less common than an ACL knee injury, a torn posterior cruciate ligament can be painful and sideline you for months. Find out more.

Precocious puberty

Precocious puberty is a rare condition in which the physical signs of puberty begin to develop too early in children.

Pseudogout

Signs and symptoms of pseudogout may seem similar to those of gout, but the causes and treatment of the two conditions are completely different.

Pseudomembranous colitis

Pseudomembranous colitis is an inflammation of the colon that occurs most often in people using antibiotics.

Psoriatic arthritis

Some people with psoriasis may develop joint pain called psoriatic arthritis. Get the basics here.

Pulmonary atresia

Pulmonary atresia is a heart defect that you're born with. Fortunately, treatment soon after birth and ongoing throughout childhood and adulthood greatly improve your prognosis.

Reactive arthritis

Reactive arthritis is an inflammatory condition that develops in response to an infection in another part of your body.

Rheumatoid arthritis

Rickets

Rickets is a severe and prolonged vitamin D deficiency that leads to softening and weakening of the bones in children.

Rotator cuff injury

A rotator cuff injury is a painful shoulder condition often caused by lifting, falling or repetitive motions. Explore treatments including exercise therapy, medications and surgery.

Sacroiliitis

Sacroiliitis is one cause of low back pain and discomfort. It's an inflammation of the sacroiliac joints, which connect the lower spine and pelvis.

Sarcoidosis

Sarcoidosis starts in your lungs but can cause inflammation in any part of your body. It can last a lifetime, or disappear in a few years.

Sciatica

The pain of acute sciatica can be excruciating, but it usually goes away in about six weeks. Learn how to feel better in the meantime.

Scoliosis

Scoliosis is an abnormal curvature of the spine. Most cases are mild, but severe cases may require treatment with braces or surgery.

Separated shoulder

A separated shoulder is an injury to a specific joint in the shoulder. Conservative treatment is usually effective.

Septic arthritis

Septic arthritis occurs when a joint becomes infected. Find out more about this serious condition.

Shin splints

The term "shin splints" refers to pain along the shinbone. Shin splints are common among runners, particularly those just starting a running program.

Snoring

Snoring may be just a nighttime annoyance, or it may indicate a more serious health condition. It can also disrupt your life and relationships.

Soft tissue sarcoma

Soft tissue sarcomas are uncommon cancers that originate in the soft tissues of your body.

Spinal cord injury

Sprains and strains

Sprains and strains — damage to ligaments, tendons and muscles — can result from overdoing physical activities. Learn ways to prevent this damage.

Stickler syndrome

Stickler syndrome can affect multiple parts of your body, including your eyes, face, ears, bones and joints.

Stress fractures

Stress fractures are tiny cracks in a bone. Simple steps can help prevent this common overuse injury.

Takayasu's arteritis

Takayasu's arteritis is an uncommon form of vasculitis that affects the large arteries.

Tapeworm infection

Tapeworms most commonly enter your body through contaminated food or water. Symptoms aren't always present, but the prognosis is good with prompt diagnosis and treatment.

Tennis elbow

Tennis elbow usually results from repetitive contraction of the forearm muscles — causing pain where the muscles attach to the elbow. Rest and pain relievers may help.

Thoracic outlet syndrome

Thoracic outlet syndrome is a group of disorders that occur when the nerves or vessels in the shoulder area (thoracic outlet) are compressed.

Throat cancer

The most common throat cancers are linked to smoking and excessive alcohol use.

Thumb arthritis

Thumb arthritis (basal joint arthritis) occurs when the joint at your wrist and the base of your thumb develops osteoarthritis.

TMJ disorders

TMJ disorders are painful conditions centered where your jawbone attaches to your skull. The pain may be temporary or chronic.

Tooth abscess

Tooth abscess — Comprehensive overview covers symptoms, causes, treatment of this painful tooth condition.

Trench mouth

Although trench mouth is much less common than in years past, some people still get this painful gum infection. Brushing and flossing are keys to prevention.

Tularemia

Tularemia is a rare, highly infectious disease spread by insects and wild animals. Landscapers, hunters and laboratory workers are especially at risk.

Umbilical hernia

An umbilical hernia causes a bulge near the navel. Most umbilical hernias close on their own by age 1.

Vaginal cancer

Vaginal cancer is a rare cancer that typically occurs in older women.

Vascular dementia

Vasculitis

Vocal cord paralysis

Vocal cord paralysis occurs when one or both of your vocal cords don't open or close properly.

Water on the knee

Water on the knee refers to excess fluid inside or around your knee joint. Find out what causes this common knee problem.

Whiplash

Whiplash is a neck injury often linked to auto accidents. Discover which treatments work and which don't.

Wrist pain


Feb. 16, 2012