Psoriasis is a common chronic inflammatory skin disease that is polygenic and inherited, and trauma, infection, and medications may induce the disease in susceptible individuals. Pruritus, scaling and visible plaques are the main problems that plague patients. Currently, psoriasis lacks a cure and current treatments, although effective, are still unsatisfactory. Maintaining a good lifestyle and paying attention to the details of life are beneficial to the treatment and recovery of psoriasis: 1. Emotional tension, anxiety, stress, etc. can affect the immune system function and trigger or aggravate psoriasis; 2. Cold is a very obvious environmental factor. There are more psoriasis patients in the north of China than in the south, and there are more onset of psoriasis in winter than in summer, which may be related to less sun exposure in winter and easy to catch a cold; 3, trauma is also very important, psoriasis patients, especially those in progress, should try to avoid trauma, otherwise new lesions will appear at the trauma site due to isomorphic reaction; 4, infection factors should not be ignored, bacterial infections, especially upper respiratory tract streptococcus or aureus Bacterial infections, especially upper respiratory streptococcal or staphylococcal infectious pharyngitis, tonsillitis is one of the important factors in the development of psoriasis, and chronic infections such as chronic gingivitis may induce or aggravate psoriasis. Many psoriasis develop after cold and pharyngitis; 5. Smoking and drinking can also aggravate psoriasis; 6. It has been known that many drugs, such as NSAIDs, lithium, antimalarials, captopril, botulinum toxin, etc., can aggravate psoriasis; 7. Foods that are contraindicated by everyone, such as milk and eggs, have little to do with the development of psoriasis.