Actinic keratosis

Actinic keratosis is a skin growth that appears as a rough, scaly patch. Left untreated, skin cancer sometimes develops.

Age spots (liver spots)

Age spots tell more than your age. They also indicate how much time you've spent in the sun.



Basal cell carcinoma

Most cases of basal cell carcinoma, the most common type of skin cancer, can usually be prevented. Learn how.


Ehlers-Danlos syndrome

Epidermolysis bullosa


Granuloma annulare

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

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

Krabbe disease

Krabbe disease is a rare, inherited disorder — most often affecting infants — that impairs functioning of the central nervous system and usually leads to early death.

Lichen nitidus

Lichen planus

Lichen planus is an inflammatory disorder that results in lesions on the skin or mucous membranes.

Limited scleroderma (CREST syndrome)



Merkel cell carcinoma

Merkel cell carcinoma is a rare, aggressive skin cancer. Chronic sun exposure or a weak immune system may increase your risk of developing it.



Pityriasis rosea

Polymorphous light eruption

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

Pyoderma gangrenosum causes painful, widening ulcers to appear on your skin. Prompt treatment reduces the risk of scarring.

Reye's syndrome


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.

Seborrheic dermatitis

Stubborn, itchy dandruff can be a sign of seborrheic dermatitis. Find out what you can do to treat this flaky skin condition.

Seborrheic keratosis

Older adults often have at least one seborrheic keratosis. Find out if you need to be concerned about this common skin growth.

Skin cancer

Squamous cell carcinoma of the skin

Stevens-Johnson syndrome

Stevens-Johnson syndrome is a disorder of the skin and mucous membranes. Often, this severe adverse reaction is caused by medication or an infection.

Sun allergy

Sweet's syndrome

Sweet's syndrome, also called acute febrile neutrophilic dermatosis, is a skin disorder marked by a rash, fever and high white blood cell count.


Feb. 16, 2013