According to the module on the liver, herbs that help support liver function are supposed to help. So try dandelion root, burdock root, and milk thistle. Also, Doc has a ready for purchase formula called Immu Kool. I’ve taken it, and it does help mitigate my body’s allergic response to wheat, and help me purge the eosinophils faster.
If stress exacerbates the way your body responds to allergens, then that might be why skullcap was suggested. Lemon Balm would also be helpful in that respect.
If you’re prone to allergic rashes, I’ve found a tea made from dandelion flowers spritzered onto the rash and allowed to air dry helped immensely in relieving the itching. You could see if it helps you too.