Psoriasis is a chronic, non-communicable disease that can occur at any age, being more frequent in the 50-69 age group. The etiology of psoriasis is still unknown. There is evidence of genetic predisposition and, although no responsible antigen has been defined, there is a possibility that it is an autoimmune disease.

Psoriasis can also be caused by external and internal triggers such as mild trauma, sunburn, infections, drugs or stress.

Skin cells are normally replaced every 3 to 4 weeks, but in psoriasis this process only takes 3 to 7 days, resulting in lesions that manifest themselves on the patient’s skin.