Physiological reasons, obesity: people who eat greasy food for a long time and lack exercise lead to obesity, which easily leads to fat accumulation and thick back. Lack of exercise: People who lack exercise for a long time will have their back muscles degenerate without exercise, which will also lead to back thickness. Second, pathological reasons, centripetal obesity: If glucocorticoid is taken orally for a long time, it may lead to centripetal obesity, which will lead to fat accumulation on the back and cause the back to be too thick. Back Fasciitis: Long-term work fatigue can easily lead to back fasciitis, and may also lead to fibrosis of connective tissue in the back, leading to back thickening. In daily life, we should eat reasonably and exercise properly to avoid the situation of thick back. If the back hypertrophy is caused by pathological factors, you need to go to the hospital in time and treat it according to the doctor's guidance to improve the clinical manifestations.