Chronic low urine without swelling can be caused by physiological reasons such as drinking less water and sweating more, and renal diseases are generally not considered, but they can not be completely excluded. Prolonged low urine but no swelling indicates that the body’s in and out is in dynamic balance. It may be because of drinking less water, for example, some people basically drink less water, just drink a little soup during meals, so that the amount of urine will not be a lot, but there will be no swelling, so it is normal. There is also a part of the people do not drink a lot of water, but sweating more, after sweating is not able to replenish the body’s lack of water in a timely manner, there will be an increase in antidiuretic hormone in order to reduce the amount of urine to maintain the body’s needs, this is a physiological regulation, there will be no swelling. To summarize, long-term urine but not swelling, consider physiological reasons, but does not mean that the patient’s kidneys do not have disease, serious cases are recommended to go to the hospital to clarify whether there is a problem.