Psoriasis
Psoriasis is a skin disease that causes red, itchy scaly patches, most commonly on the knees, elbows, trunk and scalp. Psoriasis is a common, long-term (chronic) disease with no cure. It tends to go through cycles, flaring for a few weeks or months, then subsiding for a while or going into remission.
Triggers include infections, stress and cold.
The most common symptom is a rash on the skin, but sometimes the rash involves the nails or joints.
Treatment aims to remove scales and stop skin cells from growing so quickly.
