A condition in which skin cells build up and form scales and itchy, dry patches.
Treatment can help, but this condition can’t be cured
Requires a medical diagnosis
Lab tests or imaging rarely required
Chronic: can last for years or be lifelong
Psoriasis is thought to be an immune system problem. 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. Topical ointments, light therapy and medication can offer relief.