It is generally not normal for a broken ankle to still be swollen more than 40 days after it was broken, and possible causes include incorrect treatment, ligament damage, and fracture. Wrong treatment of the ankle can slow down and prolong the recovery time of the ankle. Acute treatment of ankle sprains includes braking, brace protection, elevation of the affected limb, and ice packs. Within 72 hours of the injury, ice rather than heat should be applied, and if the affected limb is kept down or walking with weight bearing the swelling lasts longer. Secondly, after a period of time after the broken foot is not good, there is likely to be ligament damage, ligament tear recovery is generally in 4 to 5 months, this period, if repeated repetitions of some ankle weight-bearing, force and acceleration of the action, it is very likely that in the end the ankle ligament sprain. If there are signs of fracture, can be manifested as pain aggravation, local persistent swelling, simple conservative treatment generally can not be recovered, the need for surgical treatment. You need to go to the hospital to determine the degree of sprain and whether it is accompanied by ligament damage or fracture, according to the individual situation for further treatment.