Are you over-worried about your health and see the doctor when you feel ill?

Your friend is probably psychosomatic. As for your concern of belittling an illness and it goes away spontaneously, i also do that. In fact, i can feel enlarged lymph nodes below my neck (this would mean that i have infection on the adjacent areas) but i dont really mind it at all. Yes, it does hurt when i yawn sometimes but i still dont mind. I can tolerate it.

I wasn't over-worried about my health because I'm young and healthy. I like to keep fit. In anther way I go to physical examination every year when I was every index is normal in the medical report I will take it easy.

I'm not sure whether i agree to your opinion or not, but i just want to add that i myself am similar to your friend, but i do have some heavy reasons. When i was young, i used to suffer much because of nasal polyps. The procedure of removing nasal polyps was very painful to me, i remember walking out of the hospital shocked. But as i had many allergies, the polyps just grew back often, so i had to do the operation many times. That is why i still worry (maybe too much) about my health. Maybe your friend had an similary experience, and she's worrying because she doesn't ever want to go through these painful phases again.