Low bone mass may cause the following hazards: 1. It may lead to weakness without obvious triggering factors, often feeling inexplicable general weakness and weakness of the lower back and knees, and a significant decrease in strength during strenuous activities. 2. 3. It may lead to electrolyte disorders, because bone is the largest storehouse of calcium and phosphorus in the human body, and a low bone mass may lead to a decrease in the level of calcium and phosphorus in the blood, which may cause muscle twitching and, in severe cases, affect the autoregulation of the heart muscle cells, leading to arrhythmias. If there is a serious decrease in bone mass, it may lead to pathological fractures during normal activities.