Anti-inflammatory injections are usually applied for no more than two days after femoral head replacement, and some patients may take longer if an infection occurs. Anti-inflammatory injections usually refer to antibiotics, which are medications applied against pathogenic microorganisms that cause infection. Femoral head replacement surgery is an aseptic surgery, which means that the patient is not contaminated by pathogenic microorganisms at the time of the surgery, and there are no special circumstances to not apply anti-inflammatory injections. In order to prevent infections, anti-inflammatory injections can be given once before or during the surgery, and anti-inflammatory injections are usually given routinely for two days after the surgery to prevent infections. If the patient has fever, obvious inflammatory exudation from the local incision, redness and swelling around the incision, and bacteria are detected from the secretion, then sensitive antibiotics should be applied according to the results of bacterial culture, such as Staphylococcus aureus infection, cefazolin sodium can be applied, and the specific time depends on the control of the infection. How many days of anti-inflammatory injection after femoral head replacement should strictly follow the doctor’s requirements, do not apply on your own, so as not to cause adverse effects.