Long-term application of Dacronin can not be desensitized. Topical application of Dacronin belongs to Dacronin ointment, full name is Dacronin Chlorhexidine Sulfur Ointment, is a kind of insecticide, can treat scabies, itself does not have the role of desensitization, and can not be applied for a long time. Dacronin Chlorhexidine Sulfur Ointment is a compound preparation, mainly containing sublimated sulfur, Dacronin Hydrochloride and Chlorhexidine Acetate, of which sublimated sulfur can kill bacteria and scabies, Dacronin Hydrochloride is a local anesthetic, which has the effect of relieving itching and pain, and Chlorhexidine Acetate has a broad-spectrum antimicrobial effect, and it is mainly used in the treatment of scabies. Long-term external use has an irritating effect on the skin. During the use of Dacronin Chlorhexidine Sulfur Ointment, there is a possibility of adverse reactions such as redness, swelling, rash and conscious itching at the site of application, and it is recommended that those who are allergic to this product should be prohibited from using it, and it should be prohibited from using it around the eyes. When using medication, it should be strictly under the guidance of a doctor to use reasonably, not blindly self-medication.