After the injection, you generally have to wait three days before you can take a shower, if you take a shower too early after the injection will cause local infection. When the injection is generally the needle into the skin and muscle layer, and then push the drug into the muscle layer inside, in the process of the skin puncture, will cause traumatic injury, traumatic injury is very minor, can rely on their own repair to heal, without special treatment. However, if you take a shower within three days after the injection, as the injection eye is not completely healed, it will cause infection, especially when the injection site repeatedly rubbed in the shower will cause infection in the eye area. Therefore, you should not take a bath too early after the injection, and you should not rub the eye of the needle repeatedly after three days to avoid infection.