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Don't worry and relax. Psoriasis is a autoimmune disease
of skin which is a chronic condition. It needs regular treatment for long duration. It might take a long time to control the disease. So you have to have patience. Have faith in your treating doctor. Discuss all the stuff with him.
You can try some relaxation exercises like deep breathing, progressive muscle relaxation
, yoga or meditation. Take help of a psychiatrist
for some counselling
Dr. Gourav Monga