Please ask about kidney stone disease, how big does the stone have to be before surgery is required

Patient's question:

Please ask about kidney stone disease, how big does the stone have to be before surgery is required

Doctor's answer:

Hello, urinary stones must be expelled from the body; otherwise, they may lead to hydronephrosis. Kidney stones do not require treatment or can be passed using lithotripsy medication. Suggestions: If urinary stones cannot be passed using the method of crushing, surgery may be necessary to remove them.