You might have an itch that must be scratched. Or a tickle on your back that you can’t reach. It’s often hard to pin down just what’s causing it. It may be as simple as the clothes you wear. But it can also be a symptom of something more serious, like a rash or an illness.
Start with the simplest solutions. Try a different fabric, take care of your skin, and avoid anything that seems to trigger the itch. If that doesn’t help, ask your doctor, who will check on the cause and the treatment you need.