Male urinary calcium excretion of 24 hours > 300mg, female urinary calcium excretion of 24 hours > 250mg is called high urinary calcium, high urinary calcium may cause hypocalcemia, urinary stones and other diseases. 1. Hypocalcemia: due to excessive calcium ions outflow from urine, it will lead to the decrease of calcium ions in the blood, which will lead to hypocalcemia, whose manifestations are mainly numbness around the mouth, twitching of hands and feet, and so on. 2. Urinary stones: some calcium-containing stones are mainly related to excessive urinary calcium, which may cause stones in different parts of the body, such as ureter and bladder. The formation of stones will usually have symptoms of abdominal pain, bladder stones will also have symptoms of interruption of urine flow. If you find high calcium in urine, it is recommended to go to the hospital immediately to identify the cause of the problem and follow the doctor’s instructions to avoid serious complications.