Sulfur soap is less concentrated and can kill some mites to a certain extent, but it is difficult to kill all of them. The skin condition of each person is different and the effect of killing mites is naturally different, so there is no clear answer to how many times you can use it to kill all the mites. The mites that live in the facial follicles are mainly wormy mites, and the use of sulfur soap to kill wormy mites, usually 1-2 times a week, after the facial condition has improved, discontinue use as appropriate, not continuous, long-term use. The sulphur soap is alkaline, long-term use will disrupt the acid-base balance of the skin surface, leading to thinning of the stratum corneum, and may lead to skin peeling and irritation of the skin, causing skin allergies, and long-term use will leave the skin in a dehydrated state. The soap base in sulfur soap removes oil quickly and is not suitable for dry skin and allergic skin. In addition, worm mites can be spread by contact, try to ensure that each person is equipped with a separate washbasin and face wipes to avoid infecting others.