Psoriasis is a common skin disease characterized by thickened patches of inflamed, red skinPsoriasis covered with thick, silvery scales. The elbows and knees are the most common areas affected by psoriasis. It will often appear in the same place on both sides of the body. The patches can range in size from smaller than a dime to larger than a hand.Description of Psoriasis Normally, skin cells mature and shed after about a month. In psoriasis, the cell maturation speeds up, taking only three to four days. Because the lower layer of skin cells divides more rapidly than normal, dead cells accumulate in thicker patches on the skin’s outermost layer (called the epidermis).
What are the psoriasis causes?
The underlying psoriasis cause is unknown. However, it can be genetically inherited or passed from generation to generation. Most researchers agree that the immune system is somehow mistakenly triggered, which speeds up the growth cycle of skin cells. A normal skin cell matures and falls off the body’s surface in 28 to 30 days. But a psoriatic skin cell takes only three to four days to mature and move to the surface. Instead of falling off (shedding), the cells pile up and form the lesions. Possible triggers include:injury, illness, infection, steroids, and reaction to medications. Psoriasis is not an infection and it is not contagious.
Can psoriasis affect all parts of the body?
Psoriasis most commonly appears on the scalp, knees, elbows and torso. But psoriasis can develop anywhere, including the nails, palms.