Lactic acid can be reduced by accelerating oxygen supply to the thigh. The simple method is to promote blood circulation, transport oxygen and metabolize lactic acid, such as massage, safflower oil, wind-chasing oil and Xiaohuoluo pills. Or directly enhance your oxygen supply ability by strengthening your physique, such as aerobic exercise and fitness. Hang a bottle of glucose or spray it with Yunnan Baiyao (non-powder) to solve it immediately.