My dog has seasonal allergies. If it’s not terrible. We wipe her off with a very wet towel as best as possible during the spring. The vet gave us this spray (which doesn’t need a prescription) to help with irritated skin.
Dechra MiconaHex + Triz Spray for Dogs, Cats & Horses https://www.amazon.com/dp/B07YFDZTWF/ref=cm_sw_r_cp_api_glt_fabc_B8HVE9WZ98D7REFYMFHS
When the itching is especially bad and can’t be controlled, she gets a shot from the vet.