Diet Plan for Psoriasis Patients Psoriasis is a skin disease, which is non-contagious in nature. It is characterized by scaly patches, which are red in colour. These patches appear on the scalp, elbows and knees. These lesions may vary from minor patches appearing at local points to the entire portion of the body. The major causes of psoriasis are yet to be known. Often it is said that heredity plays a huge role in causing psoriasis. Also, a weakened immune