Why does my dog keep biting or chewing its skin? | arlo.® Atlas
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Overview
If your dog keeps biting or chewing its skin, it usually means something is irritating them. Common reasons include parasites, allergies, dry skin, a dirty or matted coat, or a sore patch they’re trying to reach. Lice can be one possible cause, but it’s not the only one, so it’s worth checking the skin and coat carefully before assuming what’s behind it.
Things To Check
1. Look at the exact spots your dog is chewing, including the rump, back, belly, neck, legs and base of the tail.
2. Part the coat and check for redness, scabs, flakes, broken skin, bald patches or signs of moisture.
3. Use a fine-toothed comb if you have one and look for tiny moving insects, nits on the hair shafts or debris in the coat.
4. Check whether the itching is worse after walks, grooming, time outdoors or contact with other animals.
5. Notice whether your dog is also scratching, rubbing, licking paws, shaking its head or seeming restless.
6. Look for matting, dirt, burrs, grass seeds or anything trapped close to the skin.
7. Think about whether anything has changed recently, such as shampoo, bedding, diet, flea control or exposure to other pets.
Common Causes
Lice are one possible cause, especially if you can see tiny insects or nits and the coat looks unkempt or irritated.
Fleas are very common too, and dogs can chew themselves a lot even when you don’t immediately spot them.
Allergies, including reactions to food, pollen or household irritants, can also cause ongoing itching and chewing.
Dry skin, a poor coat condition, tangles or something physically irritating the skin, such as dirt or plant debris, can make dogs bite at themselves.
Sometimes a sore spot, hot spot, infection or another skin problem is the real reason, rather than itching on its own.
What To Do
Check the coat carefully and keep a note of where and when the chewing happens, as that can help you spot a pattern.
If the coat is dirty or tangled, gentle grooming can help you see the skin more clearly and remove anything trapped in the fur.
Wash bedding regularly and keep your dog’s resting areas clean, especially if you suspect parasites or skin irritation.
Avoid using human skin products or anything harsh on the area, since that can make irritation worse.
If your dog is chewing one area repeatedly, try to prevent further trauma while you monitor it closely.
When To Contact A Vet
Speak to your vet if the chewing is persistent, the skin looks sore or broken, or you can’t find an obvious cause. It’s also sensible to get advice if you suspect lice or another parasite, because the treatment approach depends on what’s actually affecting your dog.
Contact your vet sooner if your dog seems unwell, the itching is severe, or the skin is becoming red, swollen, smelly or infected.
Products That May Help
If your dog’s skin or coat needs regular washing or grooming support, the Pet Care collection may be useful as part of a gentle home-care routine.
Related Questions
How can I tell if my dog has lice?
Why is my dog chewing its paws and legs?
When should I worry about my dog’s itching?
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.