Swelling of the ankle joint after functional training is considered as ankle sprain, which can be relieved and treated by physical therapy such as cold compresses, medication such as aspirin and surgery such as arthroscopic repair. 1. Physiotherapy: After ankle sprain, rest should be taken immediately and the damaged ankle joint should be braked; ice packs can be applied within 72 hours after the injury to relieve the pain and reduce the swelling of the joint; compression bandages such as elastic bands should be applied if necessary to reduce the swelling of the joint and immobilize the joint; and the affected limb should be elevated to help the venous return and reduce the swelling. 2. Medication: For patients with obvious pain, non-steroidal anti-inflammatory drugs such as aspirin, diclofenac and celecoxib can be used for pain relief and anti-inflammatory treatment to reduce pain and edema of the affected limb. 3. Surgery: When there is obvious instability or important ligament rupture in the ankle joint, and the requirement of ankle joint function is high, arthroscopic repair, incision repair, reconstruction of damaged ligament and other surgical treatments can be taken. Swelling after functional training of the ankle joint, it is recommended to consult a doctor in order to clarify the diagnosis and carry out targeted treatment. In addition, all of the above medications should be taken under the guidance of a doctor and should not be used without authorization.