Progesterone intramuscular injection precautions are as follows: 1. The medication must be used only under the guidance of a doctor, not without authorization. The progesterone itself is a progestin, if used improperly, it may cause irregular vaginal bleeding in the clinic. 2, after the intramuscular injection, because progesterone itself is an oil, so the injection to the local will cause absorption difficulties. It is recommended that local hot compresses be applied after the injection to promote the full absorption of the drug. 3. If progesterone is injected intramuscularly for 3 days after clinical use to induce menstruation, vaginal bleeding will occur 3-7 days after stopping the drug. If there is still no menstruation on the eighth day, you must go to the hospital for examination to rule out the possibility of pregnancy. 4. Patients who are clinically allergic to progesterone are not allowed to be treated with progesterone injections.