Thigh soreness, squatting, mainly due to the anterior side of the thigh quadriceps muscle strains, strain and cold conditions, the formation of aseptic inflammatory foci in the local area, inflammatory metabolites of the surrounding tissues to produce stimulation, there will be this soreness. Usually when squatting, the quadriceps muscle needs to maintain a contracted state to maintain stability, so it will lead to these parts of the pulling stimulation, the emergence of obvious pain, resulting in squatting inflexibility, and in the squatting will appear obvious pain. After this situation to let the quadriceps muscle in a relaxed state, avoid continuing activities as well as exertion, more hot water bags for hot compresses, increase blood circulation, promote the absorption of inflammatory metabolic products. Be sure to pay attention to keep warm, avoid cold, otherwise it will lead to further accumulation of inflammatory metabolites, resulting in more obvious stimulation of the surrounding, the pain will be more obvious.