The ankle sprain is one month old and the swelling has not completely subsided yet. It may be that the local soft tissue damage was more serious at the time of the sprain, or that I did not rest well and walked on the ground too early. In addition, there was a fracture in the local area, which was not detected at that time. If the swelling is obvious, it is better to improve the local X-ray examination and, if necessary, CT and 3D reconstruction to determine whether there is a combination of bone fracture and other conditions. If the ankle sprain is combined with a fracture, the local swelling may be repeated for two or three months. If there is no fracture, but only local soft tissue injury, you can consider spraying swelling and pain aerosol in the local area, and bubble hot water if there is no obvious wound. You can use creams, such as pain-relieving plasters, on the local area. Pay attention to rest and avoid walking long distances and strenuous exercise, which will help the local swelling to subside.