A three-day sex life will generally not hurt the kidney. Sex once every three days generally will not hurt the kidneys, but frequent sex is easy to lead to physical fatigue, and if there is unclean sex, it may lead to prostatitis, urinary tract infection and so on, so it will affect the health of the body. Young people’s sex life can be once every three days, which usually does not affect the kidneys. If you are older, once a week is recommended. This is because frequent sex can lead to symptoms such as limb weakness, sweating and mental weakness, which affects the work and life of the next day, in addition to the possibility of causing lumbar muscle strain and so on. The kidneys are mainly responsible for filtering toxic and harmful substances in the body, keeping the water electrolyte stable and maintaining the stability of the internal environment, in addition, there are certain endocrine functions such as regulating blood pressure, maintaining hemoglobin, calcium and phosphorus stability. To summarize, sex has little to do with kidney function, therefore, sex generally does not hurt the kidneys, if there is an abnormality in kidney function, you need to consult a doctor in time to find out the cause and follow the doctor’s instructions.