Consider ankle sprain, gout, bone fracture, ankle tube syndrome, rheumatoid arthritis and other causes of swelling on the inside of the left ankle. 1. Ankle sprain: after sprain, if the inner side of the ankle joint is swollen and painful, the possibility of ligament injury is relatively large, and it is recommended to recuperate for a period of time, and the swelling symptoms can be relieved. 2. Gout: ankle joint redness, swelling and pain, acute attacks need to consider the possibility of gout attacks. It is mainly because of the problem of purine metabolism in the body. 3. Fracture: if the ankle trauma, localized swelling, can not walk, there may be ankle fracture, need to take X-ray clear. 4. Ankle tube syndrome: the ankle tube volume becomes smaller nerve compression appears local pain, plantar sensory impairment. 5. Rheumatoid arthritis: it can cause synovial lesions, local hyperplasia and hypertrophy, symmetrical swelling and pain in the joints. The complex causes of left ankle medial swelling may also include varicose veins, diabetic complications, heart failure and renal failure and other diseases, you need to go to the hospital to check out the cause of the disease for treatment.