Fluid in the ankle joint is usually caused by injury or strain to the ankle joint, osteoarthritis and degeneration of the articular cartilage. First, the ankle joint should be elevated above the level of the heart to help swelling and fluid absorption. Second, we should pay attention to the warmth of the ankle joint, not to get cold, which will lead to the slowing down of blood circulation and the accumulation of inflammatory metabolites. Thirdly, we should take oral non-steroidal anti-inflammatory painkillers, such as loxoprofen sodium and diclofenac sodium, to reduce joint inflammation and inflammatory edema. Fourthly, we should take oral Chinese medicine to promote blood circulation and reduce swelling and pain, such as Dazhari capsule and blood circulation pain relief capsule to increase blood circulation and effectively promote the reduction of swelling and fluid accumulation. Fifth, appropriate rest should be taken, not activity, which will lead to further aggravation of ankle joint injury and strain after activity, resulting in gradual increase of joint friction in osteoarthritis, thus leading to more fluid formation.