Treatment of head lice with sulfur soap is a clinically effective treatment for head lice and should be carried out in strict accordance with the step-by-step method. After making a rich lather of sulfur soap, stay on the hair for 10 minutes, wrap the hair with a towel so that the drug effect is further released, and repeat the operation at least three times a week. Also pillowcases, sheets and covers should be washed, hot water scalded and exposed to the sun. After washing the hair with sulfur soap in severe cases, the patient must apply sulfur paste and smear the entire head with sulfur paste to achieve an effective concentration to kill head lice. Apply sulfur cream once after each wash, and if the treatment is not satisfactory or ineffective, another option is to shave all the hair and apply sulfur cream, apply it for three days, once a day. Do not wash your hair while applying it, and wash it after three days.