In a startling case from Wenzhou, southeastern China, a 32-year-old man, surnamed Wang, discovered that he had been carrying a mercury thermometer inside his body for 20 years. Wang sought medical attention at the Longgang branch of The First Affiliated Hospital of Wenzhou Medical University due to stomach pain. Initial scans revealed a foreign object lodged in his duodenum, identified as a mercury thermometer pressing against the intestinal wall, which posed a risk of internal bleeding. Wang recounted that he had accidentally swallowed the thermometer at age 12 but was too scared to inform his parents, and since he experienced no immediate symptoms, the incident was forgotten. The surgical removal of the thermometer took about 20 minutes and was successful, although the thermometer's markings had faded over time. Doctors expressed surprise at how long it had remained unnoticed and cautioned that its position could have led to severe complications if left untreated. The story has garnered attention online, with many expressing relief that the thermometer did not break and leak mercury.