Psoriasis is a common skin condition that causes red, flaky, crusty patches of skin covered with silvery scales.
These patches may appear on your elbows, knees, scalp and lower back, but can appear anywhere on your body.
Most people are only affected with small patches. In some cases, the patches can be itchy or sore.
Psoriasis affects around 2% of people in the UK. We know that certain factors can flare psoriasis such as stress, infections and using certain medicines.
Treatment of psoriasis
There's no cure for psoriasis, but a range of treatments can improve symptoms and the appearance of skin patches.
In most cases, the first treatment used will be a topical treatment, such as vitamin D analogues or topical corticosteroids. Topical treatments are creams and ointments applied to the skin.
If these are not effective, or your condition is more severe, a treatment called phototherapy may be used. Phototherapy involves exposing your skin to certain types of ultraviolet light.
In severe cases, where the above treatments are ineffective, systemic treatments may be used. These are oral or injected medicines that work throughout the whole body.