Psoriasis health advice The normal cycle of reproduction of skin cells is around 28 to 30 days, but in people suffering from Psoriasis, this cycle gets speeded up to just 3-4 days, leading to a build-up of dead skin cells on the surface levels which results in dry irritating scaly patches known as plaques, on the scalp, lower back, elbows, knees and knuckles. While there is no known cause for Psoriasis, consumption of alcohol, obesity, stress and anxiety, reaction to certain medications and exposure to sunburn aggravate the problem...