Renal calcium salt deposition mainly refers to the abnormal deposition of calcium in the kidney. Normally, calcium is deposited mainly in the bones to make them hard and supportive, and its softer tissues, such as the kidneys, heart, lungs, and liver, cannot have calcium deposits. If calcium deposits are present in the kidneys, it is an abnormal condition called renal calcium deposits. In the case of renal calcium deposits, it is necessary to actively search for the cause, which is more commonly known as hyperparathyroidism. If no specific cause is found and the renal calcium deposits are not significantly worse, no special treatment is needed at this time, only dynamic review is required. If the calcium deposits gradually increase in size and especially show symptoms of compression, such as causing hydronephrosis and pain, this is the time to give surgical treatment.