Kidney disease is often called a “silent killer” because its symptoms can be subtle or easily mistaken for other issues. While common signs like frequent urination or swollen ankles are widely known, many people overlook the more unusual signals their body might be sending. In fact, there are several odd and surprising signs that could indicate your kidneys aren’t functioning properly. Recognizing these early can make a major difference in treatment and overall health.

Some of the lesser-known symptoms include strange changes in your skin, mood, and even breath. For example, constant itching with no visible rash, an ammonia-like breath odor, or persistent metallic taste in the mouth could all hint at kidney trouble. Other weird signs might involve issues like trouble sleeping, muscle twitches, or foamy urine—things most people wouldn’t immediately associate with their kidneys.

Your body’s balance of waste and fluids is regulated by the kidneys, so when they start to fail, the effects can appear in unexpected ways. You might notice cognitive issues like trouble concentrating, or gastrointestinal symptoms like nausea and appetite changes. Some people even report extremely dry skin, puffiness around the eyes, or a yellowish tint to their skin. These symptoms can sneak up slowly and are often ignored or blamed on aging, diet, or stress.

It’s important to listen to your body and get regular checkups, especially if you’re at risk for kidney problems due to diabetes, high blood pressure, or family history. Catching these unusual signs early could help prevent serious complications. Don’t wait until symptoms are severe—understanding these 23 weird signs could help you or someone you love spot kidney disease before it’s too late.