Veterinary questions? Ask a Vet for Answers ASAP
Hi, Welcome to Just Answer. I'm Chris, a small animal Vet based in the UK. I am reviewing your question and will get back to you as soon as possible
Sorry to hear of this issue with Minnie. Given that this area is not itchy and has no known cause, I believe that this lesion could indicate a cutaneous (skin) tumour. These can be benign such as a histiocytoma or represent a more concerning malignancy such as a mast cell tumour. I would suggest taking her to your vet next week, they can perform a quick proceedure known as a Fine needle aspirate biopsy, this should help determine the nature of the lesion and help us decide how best to deal with it. If it was to be something more concerning such as a mast cell tumour, then surgical removal is usually advisible.
I hope that answers your question? Please let me know if you need any further help or advice.