Pityriasis rosea is a mild skin condition in which a rash of scaly-edged pink spots or patches appears on the body and upper arms. It mainly affects children and young adults. The cause of pityriasis rosea is unknown. The first sign of this condition is a large, round spot—called a herald patch—on the body.
The rash typically appears a week later and may cause itching.
The rash usually lasts for 4 to 8 weeks and clears up without treatment, although moisturizers, or prescribed topical corticosteroids or antihistamines, may relieve symptoms.

Othere related diseases

SCABIES
Scabies is a skin infestation caused by a mite that burrows into the skin. It is contagious and can be passed on by close physical contact. Symptoms include int...

SEBACEOUS CYST
Also called a skin cyst or an epidermoid cyst, a sebaceous cyst is a smooth lump that forms under the skin due to inflammation of a hair follicle. The cyst cont...

SEBORRHEIC KERATOSIS
Also called seborrheic warts, seborrheic keratoses are harmless, wartlike growths that most commonly occur on the trunk but may also affect the head, neck, fore...

SKIN ABSCESS
A skin abscess is a collection of pus under the skin, which is usually caused by a bacterial infection. A skin abscess typically appears as a smooth, firm swell...

SKIN TAG
A skin tag is a small, soft, painless, noncancerous growth attached to the skin by a stalk. Tags usually occur spontaneously and may grow on any part of the bod...

SOLAR KERATOSIS
Also known an actinic keratosis, a solar keratosis is a scaly skin growth caused by prolonged exposure to sunlight. The growths typically appear on the face, ea...

SQUAMOUS CELL CARCINOMA
Squamous cell carcinoma (SCC) is a type of skin cancer that arises from the outer skin layer. It may be caused by prolonged exposure to ultraviolet light (in su...

SYRINGOMA
A syringoma is a noncancerous tumor of the sweat ducts. Syringomas are most commonly found in clusters on the eyelids, but they may also occur elsewhere on the ...