I echo what e77 said. I used to lay awake at night sweating about them. The more I worried, the more pronounced they would get. I could not ignore them or fall asleep. Once I learned that they are very common, that most people seldom notice them but almost everyone gets them sometimes, that people with health anxiety tend to be much more aware of them, that anxiety can make them much worse, and that they are usually perfectly harmless... once I internalized all this information I stopped worrying about them. I will still notice them once in a while and my brain will start to take me into panic mode, but then I stop that circuit and remind myself of all the above, and they tend to go away quickly. They're hardly an issue at all for me anymore.