Health Anxiety - anyone got any good ideas of how best to tackle it?

Hi everyone,

I was just wondering if many people on here struggle with health anxiety. 
Both myself and my son really struggle with this. Any unusual or uncomfortable bodily sensation and we start to panic that there’s something terribly wrong with us. Most of the time we just about manage to keep it vaguely under control - we reassure ourselves and hope it will just go away - but I’m wondering if anyone has any ideas about good ways of dealing with that  panicky feeling when we start catastrophizing over some physical sensation that troubles us. I’m so tired of struggling with this, and so sorry to see my son struggling with it too.