Some menstrual irregularities can be treated with injections, but the majority of menstrual irregularities are treated with oral medications. For example, if the menstrual cycle is shortened due to progesterone deficiency or if irregular vaginal bleeding occurs in the second half of the menstrual period and oral medications are not convenient, intramuscular injections of progesterone may be given, and most of the time, this will improve the menstrual irregularities caused by progesterone deficiency. If you are able to take oral medication, try to take it orally to treat your menstrual irregularities. In addition, it is important to find out the cause of the menstrual irregularity. If it is due to estrogen deficiency, estrogen supplementation is necessary. If the irregular menstruation is caused by other diseases, according to the specific cause of the disease and then give appropriate treatment, will improve the corresponding symptoms of irregular menstruation.