Common problems during knee training and solutions and precautions: I. Joint swelling and discomfort. Causes: 1. weather changes. 2. excessive activity. 3. joint effusion (significant increase in mid-patellar circumference). You can try to deal with it by the following methods: 1. suspend walking and training. 2. elevate the affected limb (above the heart) immediately. If there is no relief but it gets worse, please return to the hospital for a review. If the pain in and around the joint worsens, 1. reduce or suspend the activity. 2. if accompanied by swelling and discomfort, treat as described above. 3. take appropriate oral or topical anti-inflammatory and pain-relieving drugs, such as Fotarine, etc. 4. if the painful area is not red, swollen or hot, physiotherapy measures such as hot compresses can be applied. After the symptoms are relieved, training can be resumed. If the pain is not relieved but heavier, please return to the hospital in time for a review.