Psoriasis

Psoriasis is caused by an overproduction of skin cells. It can affect all areas of the body, but is most commonly found on the elbows, knees and scalp. Symptoms include raised silvery patches of skin which have distinct red edges. On darker skin it can appear as dark brown, purple, or violet patches with grey or silvery scales. It does not scar the skin but can sometimes cause a temporary increase or reduction in skin colour.

What happens in psoriasis

Psoriasis involves an overactive immune response that causes skin cells to multiply too quickly. It's thought to be caused by a combination of genetic and environmental triggers.

The outer layer of skin (the epidermis) contains skin cells which are continuously being shed at the surface and replaced by new cells produced from beneath. This renewal process normally takes between 3 and 4 weeks. In psoriasis, new cells are produced and shed in as little as 3 to 4 days.

Treatment and support

Psoriasis is a long-lasting (chronic) condition. It usually involves periods of minimal to no symptoms, interspersed with periods where the symptoms are more severe. While there’s no cure, daily skin care and consistent moisturising can make a big difference.

Psoriasis affects around 2% of people in the UK¹. It can start at any age, but most often develops in adults under 35 years old. It affects both men and women.