Acanthosis nigricans

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

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

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





Atrial fibrillation

Atrial septal defect

Avascular necrosis

Back pain


Bell's palsy

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

Bone metastasis

Bone spurs

Breast cancer

Broken ankle/broken foot

Broken arm

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

Broken collarbone

Broken leg

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

Broken nose

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.

Broken wrist/broken hand


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


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



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.

Castleman disease

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 spondylosis

Chagas disease

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


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

Cystic fibrosis


Diffuse idiopathic skeletal hyperostosis (DISH)

Dislocated elbow

Dislocated shoulder


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.





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.


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.


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.

Fibrous dysplasia


Foot drop


Frozen shoulder

Gallbladder cancer

Ganglion cyst

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





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

Golfer's elbow

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



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.

High potassium (hyperkalemia)

Hip fracture

Hip labral tear

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


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

Inflammatory bowel disease (IBD)

Inflammatory breast 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.


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


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

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


Male breast cancer


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.

Multiple myeloma

Nasopharyngeal carcinoma

Neck pain


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


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

Non-Hodgkin's lymphoma

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.


Osteochondritis dissecans



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

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.


Peyronie's disease

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.

Posterior prolapse (rectocele)

Precocious puberty

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


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.

Recurrent breast cancer

Rheumatoid arthritis


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


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 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.



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.

Shaken baby syndrome

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.


Soft tissue sarcoma

Spinal cord injury

Spinal stenosis

Spontaneous coronary artery dissection (SCAD)

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

Sprained ankle

Sprains and strains

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.

Swollen knee

Takayasu's arteritis

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

Tapeworm infection


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

Thumb arthritis

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.

Torn meniscus

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

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.


Ulcerative colitis

Umbilical hernia

Vaginal cancer

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

Vascular dementia


Vocal cord paralysis


Wilms' tumor

Wrist pain

March 26, 2015