The main reason why the lower back is particularly painful when squatting and bending is due to strain or strain on the muscles, ligaments or tendons of the lower back, forming a sterile inflammatory lesion, and often accompanied by cold, leading to slowed blood circulation and accumulation of inflammatory metabolites, resulting in the formation of a painful local lesion, when squatting and bending, will lead to strain or strain on the muscles, or in the lower When squatting and bending, these injured muscles will contract and exert force, which will lead to the re-stimulation of the injured area, resulting in significant pain. Usually when the muscles are relaxed in the standing or lying position, the pain will be significantly improved. Therefore, it is important to choose rest to avoid muscle strain, especially not squatting and bending related positions.