Dr. Brunermer

Dr.Tail Vet

Since he isn't bothered by it, it may not be painful or itchy, which can be a good sign. The symptoms you describe could indicate several possibilities:

Ringworm: This is a common fungal infection in dogs, often presenting as a circular, hairless lesion.
Hot Spots: These are areas of skin inflammation and bacterial infection that can be caused by allergies, insect bites, or excessive licking.
Allergic Reactions: Dogs can have allergic reactions to a variety of things, such as food, plants, or chemicals, which might result in skin lesions.
Insect Bites or Parasites: Bites from fleas, mites, or other insects can cause localized reactions on the skin.

Please understand that it's hard to tell exactly what it is by looking at it alone.

Since the lesion doesn't seem to be bothering your dog (i.e., no itching, pain, or behavioral changes), it might not be an emergency. However, it's crucial to monitor the spot for any changes like spreading, color change, discharge, or if your dog starts to lick or scratch it excessively.

If the spot changes rapidly, starts to bother your dog, or if other symptoms develop, these are signs that veterinary attention is needed.

If you have any additional questions, please don’t hesitate to come back to us! Thank you.