hiya my weimeraner suffers with this i got away with jus using a cream for itchy skin from the pet shop, but my friends beagle suffers awfully with it she tried everything and in the end took her to the vets were they prescribed cream and steroid tablets shes a lot better now, maybe a trip to the vet would be the best bet and get it treated properly he wont be feeling the best while he is so itchy and sore
hi am not sure whats going on .but cant you take him to his vet, they will know, my dog had alleriges to everything and was on meds for his he also had the red ichy skin. bathing him is good should help . sorry am not help hope someone can answer you soon.