Psoriasis is a fairly common, persistent and often very uncomfortable skin condition, though one with no serious health consequences. The skin thickens and gets coated with white scales surrounded by a red, swollen border.
Psoriasis isn’t always accompanied by itching (though it can be), and it doesn’t leave scars. It typically develops on the knees and elbows, lower back, scalp, eyebrows, pubis and underarms. The nails can also be affected and can become dull, grooved and cracked. Psoriasis can occur at any age, tends to improve in summer, and can disappear and reappear for no apparent reason.