Injecting the buttocks is known as intramuscular injection in medicine, but it is not always necessary to inject the buttocks. If you choose to inject the buttocks, you may consider that the buttock muscles are hypertrophied, there are no important large blood vessels passing from the depths of the muscles, and the injection can not injure the bones, and the drugs can be easily absorbed after injection, and so on. Intramuscular injection is a relatively common injection method, which involves injecting drugs into the fuller parts of the muscles through special disposable syringes, and blood circulation through absorption by the human body, so as to achieve the desired therapeutic effect. When choosing the buttocks for intramuscular injection, on the one hand, the vision of the buttocks is exposed and the injectable area is large, which is convenient for operation, on the other hand, due to the hypertrophy of buttock muscles, the injection can not hurt the bones, and there is no important blood vessels or nerves passing through the outer and upper sides of the buttocks, so that the drugs are easy to be absorbed after injection, etc. It is recommended to choose a regular medical institution for intramuscular injection. It is recommended to choose regular medical institutions for intramuscular injection, temporarily prohibit bathing after inoculation, so as not to contaminate the eye of the needle, in addition, after the injection should also pay attention to observing the changes in the inoculation site, if there is any abnormality promptly consult a doctor.