Injections to the buttocks will usually be painful, but basically can be tolerated. The muscles of the human buttocks are relatively more developed, and the distribution of nerves is relatively less compared to other parts of the body, so the injection is usually hit this part of the body, which is relatively safe and the pain is relatively mild, while the injection will have a needle eye, there is a certain amount of trauma, so it will produce pain. Not buttock injection trauma is relatively small, so the pain of injecting the buttock is basically tolerable, do not worry too much. The injection can not be unauthorized operation, must find a professional doctor or nurse to do, because the injection also need to pay attention to the technique as well as the site, if unauthorized operation, may lead to adverse consequences.