How long it takes to wash your hair with sulfur soap to kill mites varies from person to person, and usually, patients can get better after about a month of use. Sulfur soap is not suitable for everyone. It is more suitable for patients who have seborrheic dermatitis, more oil, and hair loss. Also, patients should pay attention to the frequency of hair washing should not be too frequent, usually 2-3 days to use a sulfur soap. Because it contains acidic ingredients, frequent use can lead to hair damage as well as scalp damage. In addition, if the patient uses sulfur soap to remove mites at the same time, but also with less oil and less spicy diet, the effect is better.