The symptoms of histamine intolerance can be quite different. I am not aware of any test that really gives a definite answer. You can only keep a diet and look

The symptoms of histamine intolerance can be quite different. I am not aware of any test that really gives a definite answer. You can only keep a diet and look if the symptoms get better and then after some time try again food rich on histamines and look if the symptoms come back.