There are many myths about the masturbation effect on kidneys. Unfortunately, people often get confused about the myths and facts. 
Once, people believed that semen was produced and stored in the kidneys. So, masturbation may affect the kidney and cause damage to it. 

Now we all know that it’s not true. Semen is not produced in the kidneys, and neither it affects the kidneys. 

There is not any evidence about masturbation’s negative effect on the kidneys. 

Kidney experts state that there is no proof that masturbation can cause any damage to the kidney. 

There is a myth about losing protein and nutrients through semen; it’s also not valid. However, the semen contains some sucrose and nutrients, but the amount is not significant. 

Learn more about this: https://learnfromdoctor.com/masturbation-effect-on-kidney/