2021, Responses from: Dr VP Singh

Has there been any formal connection made between endometriosis and allergies / histamine? I have found that antihistamines help me in a bad flare up, as well as a low histamine diet minimises bowel discomfort and feelings of nausea.  Do you know anything about this?

Dr VP Singh: Histamine is implicated in neuropathic pain particularly in bladder (Interstitial cystitis). I do use antihistamines for IC from time to time.

Here is an article –

The role of histamine in neurogenic inflammation. A C Rosa and R Fantozzi


The term ‘neurogenic inflammation’ has been adopted to describe the local release of inflammatory mediators, such as substance P and calcitonin gene-related peptide, from neurons. Once released, these neuropeptides induce the release of histamine from adjacent mast cells. In turn, histamine evokes the release of substance P and calcitonin gene-related peptide; thus, a bidirectional link between histamine and neuropeptides in neurogenic inflammation is established. The aim of this review is to summarize the most recent findings on the role of histamine in neurogenic inflammation, with particular regard to nociceptive pain, as well as neurogenic inflammation in the skin, airways and bladder.

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