Welcome! Thank you for adopting! As for his condition, check out the health section for some tips. One of my fosters had what sounds like you described, and it was a yeast infection. You should def go to the vet to have it checked out and see if antibiotics are needed. If they feel its allergies, we can help you there. Many of us, including myself, have allergy ridden dogs.
Sent from my HTC Inspire using Tapatalk