Most of the time-delay sprays are mainly composed of local anesthetic drugs such as lidocaine, which are generally not particularly harmful, but may cause allergic reactions, affect the sexual experience, and trigger erectile dysfunction. 1. Allergic reaction: some people in the application of such time-lapse spray, may produce local itching, tingling, rash and other allergic reactions. 2. Impact on sexual experience: after applying the spray, it will cause anesthesia effect on the penis, which in turn affects the sexual experience. If the spray is not cleaned before sex, it may cause anesthesia to the vagina after entering the vagina, thus affecting the sexual experience of women. 3. triggering sexual dysfunction: long-term application of this drug may also trigger erectile dysfunction and other diseases. Men should correctly recognize the advantages and disadvantages of delay spray, if you need to apply this kind of drug, you must follow the guidance of the doctor.