Ankle sprain for more than a month will not hurt but still a little swollen is generally not a normal phenomenon. Ankle sprain general 1 ~ 2 weeks or so, the swelling of the injury site discomfort can gradually subside, the patient sprained more than a month swelling has not subsided to consider the abnormal phenomenon, this situation is generally associated with the injury too soon after the injury on the ground weight-bearing, inflammation of the injury site. Ankle sprain early early weight bearing, will cause local exudate increase, aggravate the pain, swelling and other discomfort symptoms, may cause sprain continue not to reduce the swelling of the situation; if the sprain of the ankle joint traumatic arthritis, the stimulation of local inflammation will lead to an increase in the inflammatory exudate, there will be recurrent swelling of the joint does not subside phenomenon. If the patient’s ankle sprain symptoms continue to be unrelieved, it is recommended to go to the hospital in a timely manner, to clarify the cause of the disease after targeted treatment, in order to reduce the adverse effects of the disease.