Table 2.

Diagnosis of histamine intolerance.

Diagnostic criteria [58]
The diagnosis of histamine intolerance is made by a combination of the following criteria: presenting ≥2 typical symptoms of histamine intolerance (see below) improvement through histamine-free diet improvement through antihistaminergic medication.
Symptom types [57,58]
Skin	Itching, sudden reddening of the skin (flush symptoms) on the face and/or body, very rarely hives, angioedema (different to urticaria) and other exanthemas
Digestion	Nausea, vomiting, diarrhea, abdominal pain
Circulation	Tachycardia, drop in blood pressure, dizziness
Respiratory	Chronic nasal flow, sneezing attacks
Neurological	Headaches, migraines
Gynecological	Menstrual cramps