Hi Sir, histamin is a product of defense mechanism that is immune mechanism of any living being. So it's a integral part but in some subject the over production or over reaction to some external stimuli (usually a foreign body living or nonliving) by the localized tissue or some time as a general overall response of body. So as you have asked there is no such process such as histamine intolerance in body .. instead, due to histamine release there is tissue response like localized itchin, increased mucous production and secretions and swelling (locally or generally) as in allergies of nose or in hives or urticaria respectively.

Yes we treat cases like this. Mainly Hep sulp and ars.iod medicines we commonly precribes for allergic conditions. More effective too.

Hello. Homeopathy has treatment for difderent types of allergies like dust, food, fragrances and sun allergies. Allergies to specific medicines do have some relief in Homeopathy. However there is no 100% guarantee of the same. Homeopathy focuses on causation behind the allergy and works by modulating the immunity.