In-depth

Brachial plexus injury

Brachial plexus injuries affect the nerves that control your arms and hands. Serious injuries require early diagnosis for successful treatment.

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.

Charcot-Marie-Tooth disease

Charcot-Marie-Tooth disease includes a group of disorders that affect the peripheral nerves, causing muscle weakness and loss of muscle bulk. Treatment focuses on managing symptoms.

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.

Conversion disorder

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

Diabetic neuropathy

Diabetes can damage nerves throughout your body — a condition known as diabetic neuropathy. Nerve damage can cause pain, disability and other serious complications.

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.

Eisenmenger syndrome

Eisenmenger syndrome, a complication of congenital heart defects, can be life-threatening if not properly treated. Find out more.

Essential thrombocythemia

Essential thrombocythemia is an uncommon blood disorder in which your body makes too many platelets, which can cause abnormal blood clotting or bleeding.

Fibromuscular dysplasia

Fibromuscular dysplasia is a rare, but treatable, condition in which the arteries to your kidneys, brain or abdomen narrow, reducing blood flow to your organs.

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.

Heart disease

Heart disease, usually thought of as blockages in the arteries that can cause a heart attack, can describe any medical condition affecting your heart.

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.

Lyme disease

Lyme disease is a tick-borne illness. Left untreated, it can lead to serious and lingering complications — including arthritis.

Meralgia paresthetica

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

Migraine with aura

Migraine with aura is a usually severe headache that's accompanied by visual disturbances, such as flashes of light, zigzagging patterns or blind spots.

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.

Neurofibromatosis

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

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.

Peripheral artery disease

Peripheral artery disease is a common circulation problem affecting the arteries carrying blood to your limbs. Painful in itself, it could signal larger circulatory problems.

Peripheral neuropathy

Pinched nerve

A pinched nerve occurs when pressure is applied by surrounding tissues. This pressure disrupts the nerve's function, causing pain, tingling or numbness.

Polycythemia vera

Polycythemia vera is a rare blood disorder in which a person's bone marrow makes too many blood cells.

Porphyria

Porphyria is a group of inherited disorders that result from buildup of natural chemicals call porphyrins, which can cause nervous system and skin problems.

Postherpetic neuralgia

Postherpetic neuralgia is sharp pain that persists in some people long after a case of shingles heals. There's no cure, but treatments can ease symptoms.

Raynaud's disease

Salivary gland cancer

Salivary gland cancer is a rare form of cancer that often begins with a painless lump in the mouth, throat or neck.

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.

Spinal cord injury

Syringomyelia

Syringomyelia is the development of a fluid-filled cyst within your spinal cord. It can cause a variety of neurological symptoms, including pain, weakness and stiffness.

Thrombocytosis

Thrombocytosis is a disorder in which your body makes too many platelets. Treatment depends on the underlying cause.

Transverse myelitis

Transverse myelitis — inflammation of the insulating material that covers nerve cells in your spine (myelin) — causes pain, muscle weakness and other problems.

Traumatic brain injury

While mild traumatic brain injury generally results in few long-term problems, more severe injury can cause several physical, emotional, behavioral, communication and cognitive problems.

Vasculitis

Vitamin deficiency anemia

Lacking certain vitamins can lead to vitamin deficiency anemia. Find out which vitamins are linked to this condition.

Apr. 20, 2013