NHS surgeon Dr Karan Rajan on his @dr.karanrTikTok account, a woman is using tweezers to examine a bladder crystal.The woman, called Lauren, holds up the nasty-looking kidney stone to the camera and explains her boyfriend has just peed it out and she feels sorry for him going through the excruciating ordeal.Writing in the on-screen caption, Lauren explains: "My poor boyfriend just peed this out."Poor urethra, I never knew kidney stones could be so evil.""Look at that sharp little razor tip," she adds, zooming in on one of the jagged edges.Adding his own commentary, Dr Karan says 10% of people will get kidney stones in their lifetime and explains how you can help avoid them.He says: "Strangely enough, low calcium can actually cause kidney.
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