The treatment of swollen and painful knees after a fall is rest, elevation of the affected limb, braking, and medication, as follows: First, rest: rest is the best treatment, and it is through rest that the local swelling and pain can be reduced. Second, elevate the affected limb: elevate the affected limb 30 degrees at night, which is conducive to venous reflux and can make the swelling and pain ease. Third, braking: clinically, splints, casts and braces are usually used for fixation. The purpose of fixation is to reduce activities, which is beneficial to the repair of damaged tissues, so that local exudation can be reduced and swelling and pain can be relieved. Fourth, drug treatment: local application of blood circulation, blood stasis, swelling and pain relief drugs, commonly used like blood activation cream, swelling and pain relief cream, Ruyi Jinhuang San, Gardenia Yellow Pain Relief San, etc., through local application of blood stasis dissipation, swelling, pain will be relieved.