I had surgery more than ten years ago. Whenever the weather changes, the scar itches. What happened?

The normal phenomenon is that normal tissues are destroyed and wounds recombine, resulting in poor local circulation and nerve conduction. Anyone with trauma will feel uncomfortable two or three days before it rains on cloudy days, and some will feel uncomfortable for decades. So no matter what you do, you must pay attention to safety. Being injured once, it is no exaggeration to say, will be painful for a lifetime. Old people often say that no matter how good the medicine is, it is better not to pull out the mouth.