Hello, thanks for your question today! I am Dr. Drew, and I am a licensed veterinarian. I'll be happy to help you in any way I can.
There's a few things you could try, to reduce Harris's irritation.
A topical cream containing hydrocortisone may be helpful,
along with cool compresses every few hours,
alternatively, a diaper rash type cream containing vitamins A & D may be soothing to the irritated skin,
regardless of which type of cream you apply, it would be wise to avoid licking at the area,
using a cone type collar if necessary,
you also could try an oral antihistamine,
such as Diphenhydramine, 2mg per kilogram of body weight, every 8-12 hours
you're very welcome -- let me know if there is anything more I can do to help.