Whether kidney bleeding is serious or not mainly depends on the primary disease causing kidney bleeding and the amount of bleeding. For example, kidney bleeding caused by kidney cancer or renal contusion is more serious if the bleeding volume is large; if the bleeding is caused by urinary tract infection, glomerulonephritis or kidney stone, generally the bleeding volume is small and most of them are not considered serious. 1. Kidney cancer: kidney bleeding caused by kidney cancer indicates that most of the diseases have developed to middle or late stage and have missed the best period of surgical treatment, at this time, if the bleeding is large, it is more dangerous and serious. 2. Renal contusion: Kidney bleeding caused by severe renal contusion may lead to acute hemorrhagic shock and endanger patients’ life if the bleeding is large, which is more serious; if kidney bleeding is caused by slight renal contusion, coupled with small amount of bleeding, which can be recovered after resting and stopping bleeding and other symptomatic treatments, this situation is usually not serious. 3. Urinary tract infection or kidney stone: if bleeding is caused by urinary tract infection, the symptoms can be relieved after active anti-infection treatment; if kidney bleeding is caused by kidney stone, you can choose surgical lithotripsy or extracorporeal lithotripsy treatment, etc. These are curable diseases. These are curable diseases and usually not serious. In addition, bleeding caused by glomerulonephritis is usually less bleeding and mostly not considered serious. There may be other reasons for kidney bleeding, so it is recommended to go to regular hospitals in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.