Actinic keratosis is a skin growth that appears as a rough, scaly patch. Left untreated, skin cancer sometimes develops.
Age spots tell more than your age. They also indicate how much time you've spent in the sun.
Anhidrosis means no sweat — literally. The main symptom of this potentially life-threatening condition is the inability to sweat normally.
Anthrax is a deadly bacterial illness that normally affects animals. But in rare instances, humans can contract the disease.
Most cases of basal cell carcinoma, the most common type of skin cancer, can usually be prevented. Learn how.
Bullous pemphigoid, a rare skin condition that usually affects older adults, results in large blisters and severe itching.
Dermatomyositis is an inflammatory muscle disease that causes muscle weakness as well as a skin rash. Treatment improves both problems.
Ehlers-Danlos syndrome (EDS) includes a group of uncommon genetic disorders that mainly affect the joints, skin and walls of blood vessels.
Epidermolysis bullosa is a group of inherited skin diseases whose hallmark is fragile skin that blisters easily. Severe forms may be life-threatening.
Folliculitis occurs when damaged hair follicles become infected. Most cases are minor, but severe infections can cause scarring and hair loss.
Granuloma annulare is a chronic skin condition that causes raised, reddish or skin-colored bumps (lesions) that form ring patterns, usually on the hands and feet.
Henoch-Schonlein purpura causes inflammation of small blood vessels (vasculitis) and often a purplish rash. It's most common in children ages 2 to 6.
Ichthyosis vulgaris, also called fish scale disease, causes severely dry, scaly skin. With no cure available, treatments focus on controlling the symptoms.
Krabbe disease is a rare, inherited disorder that impairs functioning of the central nervous system, and most often affects infants, leading to early death.
Lichen nitidus, a rare condition in which tiny bumps emerge on the skin, usually clears up without treatment.
Lichen planus is an inflammatory disorder that results in lesions on the skin or mucous membranes.
Icy hands, tight skin on your fingers and face, and dilated blood vessels are just some of the problems that can occur with limited scleroderma.
A lipoma is a fatty tumor located just below the skin. Treatment usually isn't necessary.
The risk of melanoma among young adults, especially women, is on the rise. Find out how to reduce your risk of this dangerous skin cancer.
Merkel cell carcinoma is a rare, aggressive skin cancer. Chronic sun exposure or a weak immune system may increase your risk of developing it.
Most moles are harmless and don't need treatment. But it's good to examine your moles regularly. In rare cases, moles can become cancerous.
Neurodermatitis is a stubborn skin condition characterized by chronic itching and scratching. It's not serious — but stopping the scratching can be challenging.
Pemphigus is a group of uncommon skin disorders that cause blisters of the skin or mucous membranes. Untreated, pemphigus may be fatal.
Pityriasis rosea is a common skin condition characterized by a fine, scaly rash that typically starts as one large spot and then spreads.
Polymorphous light eruption is a sun-induced skin rash affecting people who develop a sensitivity to sunlight.
Though psoriasis can be uncomfortable and sometimes painful, you can take steps to improve your symptoms.
Pyoderma gangrenosum causes painful, widening ulcers to appear on your skin. Prompt treatment reduces the risk of scarring.
Reye's syndrome is a rare but serious condition linked to giving children aspirin to treat viral infections.
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.
Stubborn, itchy dandruff can be a sign of seborrheic dermatitis. Find out what you can do to treat this flaky skin condition.
Older adults often have at least one seborrheic keratosis. Find out if you need to be concerned about this common skin growth.
The risk of melanoma, one form of skin cancer, is on the rise among young adults. Most skin cancers are preventable. Find out how to reduce your risk.
Find out how to prevent squamous cell carcinoma — a common type of skin cancer.
Stevens-Johnson syndrome is a severe disorder of the skin and mucous membranes. Often, it's an allergic reaction caused by medication, infection or illness.
Sun allergy can be a bothersome condition. Learn about causes and treatment.
Sweet's syndrome, also called acute febrile neutrophilic dermatosis, is a skin disorder marked by a rash, fever and high white blood cell count.
Vitiligo is a condition in which your skin loses pigment cells. This results in very light or white patches appearing on parts of your body.
Feb. 16, 2013
- Alguire PC, et al. Skin biopsy techniques. http://www.uptodate.com/home. Accessed Dec. 28, 2012.
- Habif TP. Clinical Dermatology: A Color Guide to Diagnosis and Therapy. 5th ed. Edinburgh, U.K.; New York, N.Y.: Mosby Elsevier; 2010. http://www.mdconsult.com/books/about.do?about=true&eid=4-u1.0-B978-0-7234-3541-9..X0001-6--TOP&isbn=978-0-7234-3541-9&uniqId=230100505-57. Accessed Dec. 28, 2012.
- Goldman L, et al. Cecil Medicine. 24th ed. Philadelphia, Pa.: Saunders Elsevier; 2012. http://www.mdconsult.com/das/book/body/191371208-2/0/1492/0.html#. Accessed Dec. 28, 2012.
- Gibson LE (expert opinion). Mayo Clinic, Rochester, Minn. Jan. 14, 2013.