Here is a link to a guide Dr Afrin co-wrote that out lines mast cell issues…it is excellent… https://www.ehlers-danlos.com/wp-content/uploads/MCAS-Primer-for-the-Gastroenterologist.pdf

Also, I take Beta Alanine, an otc amino acid supplement to kill the itch…it is typically used as a workout supplement. The dosing on the packages much higher than I need, I take 750 mg every four hours as needed…1500 mg before showering, which is a huge trigger for me…I buy it on Amazon…