What we often call food “allergies” might be forms of intolerance with different pathways, physiologically speaking. The poisonous effect of wheat gluten in gluten enteropathy worked via a different mechanism than dairy-induced asthma; or the poison ivy dermatitis; or likely immune-complex regulated arthritis. Science has not totally elucidated these mechanisms; food “allergy” might be the incorrect term but has become common.
The diagnosis is difficult to make and to confirm; but if you don’t even think of allergy, the diagnosis can’t be made. Many physicians are not trained in this. However, you might need professional help if self-observation does not solve the problem. Since all of these conditions can also be caused by far more serious diseases, by all means work with your doctor.
Here is a list of signs that should make you wonder if you have an unrecognized food issue:
Food cravings: The more you like a food the more likely it is that you are allergic to that food. The more frequent you eat a certain food or a food group the more likely is that you will develop an allergy to it.
Fatigue: After a meal you are tired. We all are tired after a heavy meal; but if you are extremely tired even after a smaller meal you should search for an allergy.
Abdominal discomfort after a meal - often within minutes but unfortunately it can even take a day or two - you feel bloated and distressed in your stomach. Diarrhea is already a more severe sign and, if chronic or intermittently recurrent, should be evaluated by a physician. Heartburn seldom is recognized as stemming from food allergies – but it often goes away when you stop eating nightshades (tomato, bell and hot peppers, eggplant, potato), nuts or dairy.
Weakness: About fifteen minutes after a meal lift your arms: If they feel heavy or ache more than usual - compared how light you felt in the morning - this might be a case of allergy.
Musculo-skeletal system: joint, tendon and muscle problems, bursitis, etc. Leave out nuts and dairy. Get evaluated for celiac disease (gluten intolerance).
Mouth: Burning in your mouth, tickling in your throat or sores in your buccal mucosa or on your tongue might signal an allergy.
Bladder: Slow flow of urine can be a sign of food allergy, due to a swelling of the urethra. Or burning of the urethra in males. Or recurrent signs of urinary tract infections – with or without bacteria growing out in culture. Irritable bladder (interstitial cystitis) might respond to leaving out coffee and certain foods.
Thirst! If you are thirstier than other people – always running around with a water bottle in your hand – think allergy.
Other diseases and complaints that might be caused - but not necessarily - by food allergies headaches, asthma, swollen glands, bleeding and inflamed gums, abdominal discomfort and bloating, diarrhea, skin problems and itching of perfectly normal looking skin, recurrent infections (sinus, UTI, etc.), itchy eyes, listlessness and mild depression, obesity and bulimia, anal itch and/or rashes, low blood pressure, dizziness, breast pain - a long list that is probably longer, recurrent phlebitis.
Most common food "allergies" I have encountered in patients: dairy, nightshade (tomato, potato, eggplant, all peppers except black pepper, chili, cayenne, paprika), nuts, wheat, corn, beef, food dyes and food preservatives. But basically every food can become a culprit. If you have pinpointed one food item as allergenic for you, compare it with other items in the same botanical family (like nightshade).
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