Mast Cell Activation and Headache Pathophysiology

Diagnostic Approach and Management

Tea contains histamine, biogenic amines, tannins, and polyphenols that may trigger mast cell degranulation in susceptible individuals, and caffeine that can influence mast cell activity 1
The American Academy of Allergy, Asthma, and Immunology recommends measuring serum tryptase during symptomatic episodes and comparing to baseline levels obtained after full recovery, with a strength of evidence rated as moderate 1, 2, 3
Additional biomarkers to consider include 24-hour urine histamine metabolites, prostaglandin D2 metabolites, and leukotriene E4, with a strength of evidence rated as low to moderate 1, 2
The American Academy of Allergy, Asthma, and Immunology recommends against using chromogranin A and heparin as validated markers for mast cell activation, with a strength of evidence rated as high 2

The American Academy of Allergy, Asthma, and Immunology recommends supine positioning for hypotensive episodes, intramuscular epinephrine for severe reactions with hypotension or laryngeal angioedema, and patients at risk should carry epinephrine autoinjectors, with a strength of evidence rated as high 2
First-line pharmacologic prevention includes H1 antihistamines, H2 antihistamines, and oral cromolyn sodium, with a strength of evidence rated as moderate to high 2
The American Academy of Allergy, Asthma, and Immunology recommends identifying and eliminating specific triggers, including tea if reproducibly associated with symptoms, and avoiding temperature extremes and mechanical irritation, with a strength of evidence rated as moderate 2