How to treat my dog's allergies at home?

I have a have 3 year old pit bull that has allergies to things that are airborne. I used to take him to the vet often but that became way too expensive to fit into my bugdet. The symptoms he gets are scabs (some leak puss), red patches in his arm pit area, and raw broken paws. I feel so bad for him because I know... show more I have a have 3 year old pit bull that has allergies to things that are airborne. I used to take him to the vet often but that became way too expensive to fit into my bugdet. The symptoms he gets are scabs (some leak puss), red patches in his arm pit area, and raw broken paws. I feel so bad for him because I know that I can't help him at the moment. His skin was fine until a couple weeks ago when I gave him a bath with baby shampoo, I have tried a lot of shampoos and that one works bets with his break outs. Please help me and my pup :(
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