Please read this thread carefully its very important!!!
So, after a lot of research I came to the conclusion that allergies can indirectly cause BB. Things like Post Nasal Drip and Sinusitis are already known to cause bb to many of us and they are very common symptoms of some allergies.
I asked my allergist about my dry mouth and if it can be caused by allergies and he said that it definitely could be an allergic reaction.
I have PND during the day but not all day long. Sometimes it just stops for a while but its usually bad when I go out (which is what led me to have a test for allergies).
Also, after having a Sinus x-ray, result came back with "Mucosal thickening" (looked like dark gray liquid-like substance on the xray). I asked allergist what this can be caused by and he said that it can be caused by allergic reactions (in my case this is the cause for sure) and it takes 1-2 or maybe more years to become bad enough to be a problem. Only solution is a simple surgery which will restore it to normal but if allergies left uncured, it will return after a few years. So he said that best solution would be to fix it with surgery and then have a full allery shot treatment to prevent it from returning.
Anyway, Im just mentioning this because it is the only evidence that shows that there's something wrong with me and Im pretty sure this has something to do with my bad breath since mucosal thickening blocks the sinuses which causes sinusitis (in this case chronic or just frequent sinus infections) which causes bad breath due to bacteria overgrowth and I dont know what else.
Now, before having the allery tests I didnt really believe that I have any allergy because none really bothered me (or so I thought). So while having numerous tests to find the cause of my bb I decided to go to an allergist just for the hell of it.
Turns out, I have 24 different allergies

Doc told me although I have a lot of them, they affect me only a little but since they are many there's just a bigger chance for me to be exposed to them (quite logical).
Now the allergy test I had consisted of 3 visits, with 1 or 2 week breaks (dont remember).
1: Doc put lots of allergens all over back and hands and he did something that felt like a needle bite to each of the spots where he put the allergens (is this what they call the "scratch test"?). Then I waited for like 20 minutes for my body to react to the allergens then he recorded them one by one. This was done to see which allergen groups I am allergic to.
2 Now that we knew the groups, we went through the exact same procedure as on visit 1, only this time it was to determine which specific allergens from the groups we discovered on visit 1, I am allergic to.
3 Now my doc ordered a blood test for the 5 allergens I am most allergic to so I went to have a blood sample taken from me.
Treatment
There's no 100% treatment for allergies but there are some methods there are 2 solutions.
1) Taking antihistamines. Antihistamines are meds that suspend the production of histamine which (if i recall correctly from school's biology) is what causes the allergic reaction.
2) Allergy shots. This is a long term treatment and its also a length process. It can take 2-3 years to complete and you need like 4-6 months to see results. Basically, it consists of weekly, bi-weekly or monthly (different for everyone) shots of big quantities of the allergen. This way your body becomes "used" to the particular allergen and becomes immune to it. The procedure is like this: you go to the doc, he gives you the shot(s) and then wait for like 15-20minutes just in case you have allergic shock so he can act immediately (i think he gives you a quick cortisone shot).
Doc also told me that you can have the allergy shot treatment for only up to 3 allergens at a time (more is possible too but in that case you get smaller doses of shots for each allergen because the total dose is split to equal doses depending on the number of allergens). The effect of the treatment can last for 5-10 years but that really depends on the patient.
The test cost me a total of about 275€ (which I got back from my insurance anyway) but I live in Greece so prices will be different in your country.
1) 110€ + 110€ each of the two visits to the allergist
2) 55€ the allergy blood test (11€ for each allergen so it depends on how many allergens your doc will order the blood test for).
The following are the results of my allergy test (note that the group names were in Greek so I translated them to English as good as I could). I wrote them exactly like they are in the result paper the doc gave me. The numbers after the allergen I think designate how much the allergen affect me but Im not sure. I dont know what the asterisk designates but I wrote it anyway.
Allergy test
Basic series of allergen groupsVernal Grass Pollen
- Vernal Grass 5/25*
- Histamine 6/35*
- Kryosph 7/35**
Tree Pollen
- Dactylis glomerata (Cockfoot) 5/30**
- Lolium perenne (Rye grass) 5/30**
- Phleum pratense (Timothy grass) 5/30**
- Triticum (Wheat) 5/25*
Bush Pollen
- Olea 5/30**
- Salix alba (Willow white) 5/25**
- Betula (Birch) 5/25**
Fungi
- Parietaria Jud (Wall pellitory) 5/25**
- Plantago lanc (Plantain) 5/25**
- Taraxacum offic 5/30**
- Chenopodium alb (Lamb's quarter) 5/25*
Plant dust
- Alternaria tenuis 5/25*
- Cladosporium herbarum 5/30**
- Aspergillus fumigatus 5/30**
- Fusarium moniliforme 5/30*
Vegetables and Sea foods
- Hay dust 5/25 **
Flours and Cereals
- Tomato 7/30**
- Shrimp 6/30**
- Wheat flour 5/25
- Corn flour 5/25
- Rye flour 5/25
Allergy blood test
Allergic tests
Description - Result - Normal values
1. g5 (Lolium Perenne, Rye-Grass) - 0.11 PRU/ml - < 0.35
Category .0, Not detectable
2. m2 (Cladosporium herbarum) - 0.08 PRU/ml - < 0.35
Category .0, Not detectable
3. w19 (Parientaria officianalis) - 0.13 PRU/ml - < 0.35
Category .0, Not detectable
4. Olive - 0.10 PRU/ml - < 0.35
Category .0, Not detectable
Immunological Tests
Description - Result - Normal values
1. IgE - 14 IU/ - < 120 IU/ml
Ok, I posted all the information I have related to allergies and I strongly encourage you to have a full allergy test because it might help you in your quest finding a cure.
As I said before, I thought I didn't have any allergies, but the test came up with 24.
Now if you have had any allergy related test please post which allergens are you allergic, what are your symptoms (as detailed as you can) and what you know about allergies in general so we can collect all info in one thread and this may benefit us all.
Excuse me for any mistakes but I'm writing this post at 5:35am

