Q. Hello, my dog had a fat tick under his chin that I removed a while ago then there was a bump so he scratched now it's a bloody scab dark nickel size:(
DR. MASSIMO ORIOLES, DVM, MRCVS
A. This could be a granulomatous reaction due to the persistence of part of the tick body inside the skin. You can try to keep the area clean with salt water (10spoons in 1 liter of water twice daily) but sometimes these local reaction requires veterinary attention.
If it is not resolving in the next 48-72hours, I would recommend to take him to your veterinarian for a check up and have some local antibiotics (cream/gel to apply on the skin).