Psoriasis is a widespread chronic recurrent dermatosis, which is characterized by abruptly limited erythemo-papulo-squamous skin changes, nail changes and seronegative deforming arthritis. It is one of the most baffling and persistent of skin disorders. The incidence of the disease depends on the climatic and genetic features of the population. The disease is less common in tropics and dark faces. It affects about 1-2% of the white population of the planet. Psoriasis symptoms are different for everyone, but include red patches of skin covered with thick, silvery scales, small scaling spots (commonly seen in children) and dry, cracked skin that may bleed.
Psoriasis is the result of a sped-up skin production process. Typically, skin cells grow deep in the skin and slowly rise to the surface. Eventually, they fall off. The typical life cycle of a skin cell is one month. In people with psoriasis, this production process may occur in just a few days. Because of this, skin cells don’t have time to fall off. This rapid, overproduction leads to the build-up of skin cells. Scales typically develop on joints, such elbows and knees. They may develop anywhere on the body, including the hands, feet, neck, scalp, and face. Less common types of psoriasis affect the nails, the mouth, and the area around genitals.
Psoriasis symptoms vary depending on the type of the disease, skin and location. Some most common symptoms for plaque psoriasis include plaques of red skin, often covered with loose, silver-colored scales. These lesions may be itchy and painful, and they sometimes crack and bleed. In severe cases, the plaques of irritated skin will grow and merge into one another, covering large areas. Also psoriasis symptoms are disorders of the fingernails and toenails, including discoloration and pitting of the nails. The nails may also begin to crumble or detach from the nail bed.
Plaques of scales or crust on the scalp
Psoriasis can also be associated with psoriatic arthritis, which leads to pain and swelling in the joints. The National Psoriasis Foundation estimates that between 10% to 30% of people with psoriasis also have psoriatic arthritis.