Prevention of psoriasis currently refers to avoiding aggravation and relapse of the disease, i.e., prolonging the remission period. It is especially important for psoriasis patients to maintain good living habits and not to be addicted to alcohol and tobacco. In addition, colds and inflammation of the throat can cause recurrence or aggravation of the disease. Proper physical exercise, improving physical fitness and maintaining mental and physical health are the keys to preventing psoriasis. As for the patient’s diet taboos need to vary from person to person, the patient can decide the trade-off depending on his or her skin reaction. Mental and psychological factors play an important part in the development of psoriasis, so relaxation is also important in prevention.