What should I do if my dog has scabs, crusts, and patchy bald spots? | arlo.® Atlas
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Overview
Scabs, crusts and patchy bald spots in dogs can happen for several reasons, including mange, other parasites, skin infections, allergies or scratching and rubbing. It’s worth checking it promptly, but it doesn’t always mean something severe.
If your dog seems otherwise well, you can look for clues at home and arrange a vet visit if the skin is sore, spreading or not improving.
Things To Check
1. Look at where the bald spots are and whether they’re on the face, ears, elbows, belly, flanks or around the tail.
2. Check whether the skin is red, warm, flaky, greasy, crusted or smelly.
3. See if your dog is scratching, rubbing, licking or biting the area more than usual.
4. Check for fleas, flea dirt, or any signs of mites, especially if other pets are itchy too.
5. Think about whether it started after grooming, a change in shampoo, a new bedding set, or time outdoors.
6. Note whether the patches are small and stable or spreading quickly.
7. Watch for any broken skin, oozing, scabs that keep returning, or signs your dog seems uncomfortable.
Common Causes
Mange is one possible cause, especially if the bald patches are spreading and the skin looks crusty or irritated. Other common causes include flea bite irritation, skin allergies, bacterial or yeast infections, and self-trauma from repeated scratching or licking.
Less commonly, hormonal issues or other skin conditions can also cause patchy hair loss and crusting. The pattern of the skin changes can help a vet narrow down the cause, but it’s not something you can confirm for certain just by looking.
What To Do
Keep the area clean and dry, and avoid using human creams or harsh products unless your vet has told you to. If your dog is scratching a lot, try to stop further rubbing or licking so the skin doesn’t get more irritated.
Make a note of when the problem started, how fast it’s changing, and whether any other pets or people in the home have skin symptoms. A few clear photos taken over a couple of days can also be helpful if you need to speak to your vet.
Regular grooming can help you spot changes early, but go gently if the skin is sore or crusted. If you use any bedding or blankets, washing them regularly may also help keep the area more comfortable while you’re working out what’s going on.
When To Contact A Vet
Speak to your vet if the patches are spreading, your dog seems itchy or sore, the skin is weeping or smelly, or the problem isn’t improving after a few days of careful monitoring. You should also get advice sooner if more than one pet is affected, or if your dog seems unwell.
Products That May Help
If your dog’s skin is looking sore, flaky or patchy, gentle washing and routine coat care may help support day-to-day hygiene while you’re keeping an eye on things.
Related Questions
Is mange contagious to other pets?
Why is my dog losing hair in patches?
Should I wash my dog if they have crusty skin?
Atlas is here to support owners with practical, easy-to-understand guidance. It is not a substitute for professional veterinary advice. If you're concerned about your animal's health, symptoms worsen, or something doesn't feel right, contact your vet.