Does anyone else suffer from health anxiety? ( or hypochondriasis, as it's been called in the past)

A family member initially started talking about different diseases that he thought he had, but the more I comfort him, the deeper into the rabbit hole I dig.

I convinced myself of several illness already, and it doesn't help that anxiety causes symptoms. It's a pretty big mess right now. I am waiting it out, but if the symptoms persist, I'll get help from therapy.