Dacronin can be washed about half an hour after application, Dacronin is a local anesthetic, the mucosal surface anesthesia effect is more durable, generally 2~10 minutes after application to take effect, can be maintained for 2~4 hours. Dacronin can be gently massaged when applied externally to the affected area to promote drug absorption and increase the therapeutic effect. Dacronin can inhibit the body’s sense of touch and pain, the skin has a pain, itching, sterilization and other effects, commonly used in burns, abrasions, insect bites, itchy rash and other diseases of pain and itching, can also be applied to the glans to treat premature ejaculation. Skin irritation such as burning sensation and allergic reactions such as rash and itching may occasionally occur in the use of Dacronin. The drug is prohibited for use in children under 15 years of age, around the eyes and in areas with broken skin, and continuous use is prohibited for more than 2 weeks. It is recommended to use the drug under the guidance of a doctor to avoid improper use and aggravation of the condition.