People often self diagnose. And make up symptoms. For many reasons.

Often for attention. Often because they don't want to treat or admit what they really have, so instead they come up with stuff that they do not have. Or they are very anxious and believe all this. Or they have health OCD (obsessed about illnesses) etc

There is no way to know why this woman comes up with this stuff. If it's irritating, it is wise to stir away or at least ignore it.