For a diagnosis, the case history is essential. However, since many complaints such as headaches, migraines, bronchial asthma, hypotension, arrhythmia and dysmenorrhea (painful periods) may be caused by something other than<unk> , it is not surprising that half of suspected diagnoses are not confirmed. The diagnosis is usually made by intentionally provoking a reaction. However, since<unk>  can potentially cause life-threatening conditions, the following procedure is preferred: take blood samples before and after a 14-day diet, and measure changes in<unk>  and diamine oxidase (DAO) levels. Rather than increase<unk>  during the test diet, eliminate it. This procedure does not endanger the patient. Quite the contrary: in the presence of<unk> , the symptoms have improved or disappeared completely. At the same time, the<unk>  blood level halves and the DAO increases significantly. If there is no<unk> , the blood levels do not change and neither do the symptoms. Simultaneously, food allergy, cross-reactions with pollen, fructose malabsorption, lactose<unk> , and celiac disease should be excluded.
Histamine intolerance
Pseudoallergy
Type I hypersensitivity
Allergy
Cholinergic urticaria
Type II hypersensitivity
Type IV hypersensitivity
NSAID hypersensitivity reactions