The lateral bulge of the ankle usually takes 4-6 weeks to recover, the details are as follows: First, if the lateral bulge of the ankle is caused by trauma, usually local soft tissue contusion and ligament damage, after immobilization, braking, elevation of the affected limb, as well as cold treatment, can be gradually recovered in about four weeks. Secondly, if the lateral ankle bulge is caused by chronic ankle synovitis, the recovery time is longer, even with comprehensive conservative treatment, can only make the localized mass shrink. Sometimes arthroscopic minimally invasive surgery is needed to remove the protruding and proliferating synovial tissues, and at the same time, rehabilitation training is carried out after the surgery, so that the localized bulge can gradually subside and return to normal in about six weeks.