Male pitbull with rash in groin area

My pitbull has a rash on his groin area, we’ve been applying some cream and that will help but only to a certain extent. We have four other dogs and he’s the only one with this rash. They are all currently on Purina Pro sensitive skin and stomach dog food. Any assistance would be greatly appreciated!

Hello!  There looks to be hair loss, too.   I'm afraid that it's very easy to underestimate a rash; we tend to see angry looking red skin and expect to pop something on it that will make it disappear.   Rather, even when this works, many rashes recurr further down the line after treatment because the underlying cause is not gone.  Skin disease can often be 'chronic,' meaning that it recurs throughout the dog's life and needs to be kept in check. So: what to do?   See your vet early, or at least give them chance to triage the case over the phone because some rashes are part of some systemic illness that they want to rule out quickly, and because spreading will just make a rash worse.    They will also be looking for yeast and bacterial infection (rarely the cause of a rash, but a common consequence) and parasites (demodex, mites, fleas - fleas don't even have to be on the pet to cause problems).   They might want to scrape for demodex. Finally there's the question of the underlying cause:  if its parasites that is lucky, because control can be introduced.  Allergies on the other hand are hard to diagnose but tend to be lifelong, so an ongoing discussion may be needed about strategies to achieve comfortable enough skin.   Heat and the skin fold can exacerbate things in the groin - it's a common spot. I have seen more complex problems eg au skin cancer or eg autoimmune disease present like this too, but these are rarer. Questions such as:. What do you see happening with this skin, moving forward? Are good ones for your vet, in order to get a good picture. I hope that this helps.  

Ooohh!  There is a cause that I didn't mention.  Sometimes, licking-related skin disease can be a sign of underlying chronic pain or endocrine disease - again, your vet will be aware of these and should flag them up if this may apply to your boy.   Best of luck!