A diagnosis of histamine intolerance is considered positive if two or more typical symptoms are present and improvement results from following a low-histamine diet and/or taking antihistamines. Have a look at the first steps page.
- Diarrhoea alternating with normal motions (Irritable Bowel Syndrome – IBS)
- Chronic constipation
- Flatulence and feeling of fullness
- Stomach cramps
- Stomach ache
Symptoms affecting head and face
- Headaches, similar to migraine
- Runny nose and weepy eyes, although there is no clinical sign of allergies
- Fits of dizziness
- Extreme tiredness, feeling knocked out
- Quinke Oedema (swellings mostly appearing around eyes and lips, sometimes in the area of the throat)
- Flushing of face and/or chest
- Skin rashes, itchiness
- Acne (pimples)
- Cardiac arrhythmia, such as a fast beating or irregular heart beat
- Dysmenorrhoea (severe period pains)
- HIT symptoms go away during pregnancy and return after birth of child
- Chills and shivers
- Low blood pressure
- Circulatory collapse
- Sudden psychological changes (e.g. aggressiveness, inattentiveness, lack of concentration)
- Sleep disorder
- You should check with the help of your GP (doctor or physician) for other intolerances of some specific foods or food groups, and allergies.
- Your GP should automatically also check for any other underlying health issues.
- Do not change any medication you have been given unless you have talked to your GP, and try to find alternatives with them if necessary.
- Going on a diet and assuming you have HIT is not a useful way of tackling the problem.