If the foot is not swollen after the sprain, but the pain is particularly severe, it is possible that the soft tissue around the ankle joint is torn and fractured. It is recommended to go to a regular hospital in time to take an X-ray of the ankle joint to rule out any fracture. If a fracture is ruled out, it is likely to be a simple sprain, and the patient can be treated with conservative treatment measures. The foot should be braked, the affected limb should be kept from weight-bearing, bed rest should be strictly applied, and local cold compresses should be applied for 48 hours to relieve the pain, or topical ointments and aerosols should be applied to relieve the pain. If there is no relief within a short period of time, you must go to a regular hospital to seek regular treatment in a timely manner.