Follow a low histamine diet- this is different for everyone but the major factors are the same regarding meat and fermented foods. Look up the SIGHI histamine list.
I take Quercetin, Nettles, bromelain, and vitamin C. I have been able to stop taking Pepcid for reflux since then. I don’t have widespread itching unless I eat a new food that I obviously shouldn’t. It hasn’t helped my seasonal allergies, though.
Lyme, Babesia, Bartonella. Symptoms began 5/2016, didn't start treatment until 9/2016. Slow but steady recovery.