Low urinary calcium may be caused by dietary problems, nephrotic syndrome, hypocalcemia, etc. It can be treated by consuming foods with high calcium content, taking glucocorticoid drugs, vitamin D3 and other drugs. 1. Dietary problems: When the food consumed for a long time is low in calcium, the calcium content in urine will also be reduced. 2. Nephrotic syndrome: due to kidney damage, resulting in filtration dysfunction, and then there is a decrease in the calcium content in the urine, it is easy to appear high blood lipids, edema and other conditions occur, can be treated by following the doctor’s instructions to take glucocorticoid drugs such as prednisone tablets. 3. Hypocalcemia: patients due to the skin by the sun ultraviolet irradiation, not good synthesis of vitamin D, resulting in the body lack of vitamin D, hypocalcemia, can take vitamin D3 to treat. If the urine calcium is low, it is recommended to go to the hospital for examination in time, and give appropriate treatment under the guidance of the doctor.