Hi Tamara,
If you can’t find a skin lesion, I wouldn’t be so quick to jump to a diagnosis. Panting and scratching can each be due to a multitude of causes – hyperadrenocorticism (Cushing’s disease), allergies, pain, and skin infection to name a few. It would be beneficial to have a complete exam and some baseline diagnostics done based on those exam findings.
I hope this gives you some direction,
Dr. Ryan Llera