I'm sorry to hear you didn't find your answer helpful. But your dog does not need to be licking or paying the area for any of these scenarios to be the case. Is it common in some instances? Yes. Necessary for a fungal infection, parasite infestation, trauma, or infection to be present? No.
The vet is absolutely the best option, as I mentioned, as we have to way to determine conclusively what this is at home and therefore we cannot treat it. The best you can do is keep the area clean as I instructed to help prevent secondary infection and irritation.
And I'm sorry you didn't find your answer timely.
Yours happened to be the first question that I answered when I logged on so it could not have been done any sooner on my end. I apologize that another expert did not help you sooner, but that's just part of the system. You post a question, and if an expert who feels they can effectively and correctly answer the question happens to be online at the time, the answer is provided right away. But if there's no experts online at the time when the question is posted who feel comfortable answering the question, there is a delay. This system protects the customer from getting incorrect answers or half-answers. Unfortunately, there's no guarantee in terms of response time, so I apologize if someone on our site misled you into believing that your question would be answered immediately or within minutes of being posted. If your question is urgent, it should be marked as such when you post it to increase the likelihood of a faster answer. If you decide to utilize JA in the future, I would recommend that.
I hope your dog is feeling better soon.