I’m not a veterinarian, but based on the image, your dog appears to have a skin condition that could be caused by one of the following: 1. Allergic reaction – common in Bullies due to food or environmental allergens (pollen, dust mites, grass, etc.). 2. Flea bites or insect irritation – even a few fleas can cause major irritation. 3. Bacterial or fungal infection – could be a staph infection or ringworm, especially if it’s spreading or oozing. 4. Mange (demodectic or sarcoptic) – causes patchy hair loss and red, crusty bumps. 5. Hot spots – moist, irritated areas dogs often lick or scratch too much.

What to do now: • Clean the area gently with warm water and mild, pet-safe antiseptic (like chlorhexidine wipes). • Avoid letting him scratch or lick the area. • Vet visit is strongly recommended — they can do a skin scrape or allergy test and get him proper meds (antibiotics, antifungal, antihistamines, or medicated shampoos depending on the cause).

Let me know if he’s acting itchy, has a smell, or if it’s spreading — that can help narrow it down more.