Delay sprays sprayed too much will lead to excessive numbness of the glans, resulting in erection difficulties, lack of sexual pleasure, ejaculation difficulties and so on. Clinically, the most commonly used male delay sprays contain ingredients such as lidocaine, bupivacaine and other surface anesthetics, which are absorbed through the skin to anesthetize the subcutaneous nerves after local medication on the penis and glans. When used in normal doses, it can reduce the sensitivity of the glans and achieve the purpose of prolonging sexual life. But if the delay spray use too much, it will lead to excessive nerve anesthesia, not only will produce the glans numbness discomfort, but also lead to a weakened feeling of sexual stimulation, resulting in penile erection difficulties as well as lack of sexual pleasure, and due to the feeling of not enough sexual stimulation, ejaculation also becomes difficult. In addition to the above adverse reactions, delay sprays may also cause allergies, skin infections, etc. Therefore, it is important to consult a doctor before using them and use them under his or her guidance. Good hygiene and cleanliness are also required, and allergy sufferers should use it with caution.