Although the disease is not contagious, it is caused by a decline in the immune function of the body, and after the first time, it does not necessarily produce antibodies, and if the virus is re-infected, the immune function of the body is reduced, and there may be the possibility of recurrence. However, if you adjust your mood, adjust your work stress, improve your immune system and strengthen your diet, you may not relapse. Once a relapse occurs, the patient needs to pay attention and go to a hospital dermatologist for antiviral treatment in time to avoid infection or erosion symptoms.