Menstruation is not recommended to indiscriminate use of drugs, in the menstrual period resistance is reduced easy to appear cold, inflammation and infection can play anti-inflammatory injection. Anti-inflammatory drugs will not affect the amount of menstruation, and will not cause abdominal pain and other conditions. If the injection is a blood-activating drug or hormone drug, it is easy to cause an increase in menstrual flow, prolonged menstrual period, etc. It has a great impact on menstruation. The injection during menstruation first determine what kind of drug it is, and then you can determine whether you can take it or not. Improper use of medication for injections during menstruation is likely to affect the amount of menstruation and also cause other discomforts such as abdominal pain. In order to be safe, it is best to avoid the use of drugs during menstruation, if you must use drugs need to be reasonable under the guidance of a doctor. During menstruation, you need to pay attention to hygiene, pay attention to abdominal warmth, drink more hot water and so on can prevent menstrual cramps, menstruation can not have sex easily cause gynecological infections.