The sudden appearance of low back pain without doing anything is mainly due to the fatigue of the muscles, tendons, ligaments and other soft tissues in the lumbar region, and accompanied by cold, such as sedentary, squatting, standing will lead to muscle and other soft tissue tension, fatigue, will form a sterile inflammatory lesions, inflammatory metabolites will stimulate the peripheral nerves around the pain sensation. In addition, when maintaining a posture for a long time, the lumbar region is also prone to cold, which will lead to a slowing of blood circulation and the accumulation of inflammatory metabolites, resulting in further pain, and inflammatory metabolites and cold stimulation of the muscles will lead to a more fatigued, tense state, and small blood vessels penetrating from the muscles will be stimulated, resulting in vasoconstriction, a further decline in blood circulation, and a further decrease in inflammatory metabolites. Further accumulation of inflammatory metabolites can lead to a sensation of back pain.