How many kidney stones can a person safely have?

Zero.

Kidney stones are hard mineral and salt deposits that form in the kidneys. They can cause severe pain, nausea, vomiting, and bleeding. In some cases, kidney stones can lead to kidney damage and even kidney failure.

There is no safe number of kidney stones to have. Even one kidney stone can cause serious problems. If you are experiencing any symptoms of kidney stones, it is important to see a doctor right away.