I have terrible allergies, but I don't know what I'm allergic to. Every local doctor I've been to, it's gone like this:
The nurse comes in and does routine nurse things that have nothing to do with allergies. Then the doctor comes in does routine doctor things that have nothing to do with allergies. (Blood pressure, stethoscope, etc.)
DOCTOR: So, what seems to be the problem?
ME: I have to blow my nose all the time.
The doctor scribbles out a random perscription.
DOCTOR: Take this for two weeks. The receptionist will make you another appointment so you can come back and tell me how it worked. Bye!
ME: Aren't you going to run any tests?
DOCTOR: Oh, there are so many allergens around here, there's no way we can tell what you're allergic to! Just take that prescription and we'll go from there!
Two weeks later.
DOCTOR: So, how did that medication work out?
ME: It didn't do anything.
DOCTOR: Oh.
Scribbles another random prescription.
DOCTOR: Here, try this one. Come back and see me in two weeks. Oh, by the way, you can't eat or drink any dairy with this one.
ME: So, you can't do that pin prick allergy test, like they show on TV?
DOCTOR: Nope! Come back in two weeks!
Then I tried an allergy specialist...
ME: I've been to all these doctors and all they do is write me random prescriptions. I didn't even try the last medication, because they never work. I don't want to leave here until I find out what I'm allergic to.
SPECIALIST: Sure.
The specialist runs a little plumber's snake with a light at the end up my nose.
SPECIALIST: Well, I have no idea what's causing your allergies!
Scribbles out a random perscription.
SPECIALIST: Take this for two weeks, then --
ME: Wait! Can't you run any tests?
SPECIALIST: Well, does fluid come out when you tip your head forward?
ME: Not really.
SPECIALIST: Well then, this probably isn't the problem, but you could get a CAT scan to see if your brain fluid is leaking. It costs $5,000. Meanwhile, take this medication for two weeks... and ("you've been a naughty patient" voice) make sure you actually take it this time.
I even tried holistic medicine. My girlfriend had a cousin who was into that. She tried to pull down my one hand while I held various foods in the other, to see if they made me "weak." I didn't even necessarily touch the food - for example, a closed jar of peanut butter. I guess she thought it was the food's "aura" that I was allergic to?
All I've actually found that helps is to make sure I get enough sleep.