Why does my dog have painful mats in its coat?
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Overview
Painful mats in a dog’s coat usually happen when loose hair, dirt or moisture gets trapped and the tangles tighten over time. They can pull on the skin and make grooming uncomfortable, but there are several possible causes, including coat type, shedding, dampness, reduced brushing or skin irritation underneath the mat.
Things To Check
1. Check where the mats are forming. Common spots include behind the ears, under the collar, in the armpits, around the tail and along the legs.
2. Look closely at the skin under and around the mat for redness, heat, swelling, scabs, broken skin or any discharge.
3. Notice whether the coat has got wet recently from rain, bathing, swimming or lying on damp bedding.
4. Check whether your dog has been shedding more than usual, as loose undercoat can knot quickly.
5. Think about whether brushing has been less regular lately, especially if your dog has a long, curly or thick coat.
6. See if your dog seems sore when brushed, touched or lifted, as discomfort can make grooming harder and mats worse.
7. Check for scratching, licking or rubbing, which can point to skin irritation underneath the coat.
Common Causes
The most common cause is simple coat tangling, often made worse by moisture, friction and loose hair. Long, curly, feathered or double coats can mat very quickly if they are not brushed through often enough.
Mats can also build up after bathing if the coat is not dried and brushed properly, or if the dog spends time in wet grass, mud or damp bedding.
Less commonly, skin irritation, discomfort, weight gain around certain areas or a medical issue affecting grooming habits may contribute. You can’t tell the cause for certain just by looking at the mat, especially if the skin underneath is sore.
What To Do
Start by checking how much of the coat is affected and whether the skin looks sore. Small tangles may sometimes be gently separated with patient grooming, but painful mats often need careful handling to avoid hurting the skin.
Keep grooming sessions short and calm, and work on a regular brushing routine before tangles become tight. Pay extra attention to high-friction areas such as behind the ears, under the collar and around the legs.
If your dog’s coat gets damp, dry it thoroughly and brush once it is fully dry if that suits the coat type. Keeping bedding clean and dry can also help reduce repeated matting.
If the mat is large, tight or close to the skin, it’s usually safer to get professional grooming advice rather than pulling at it yourself.
When To Contact A Vet
Contact your vet if the skin under the mat looks red, broken, swollen or infected, or if your dog seems very sore, restless or unhappy when touched. You should also get advice if mats keep coming back quickly, or if there may be an underlying skin problem making grooming difficult.
Products That May Help
If your dog is prone to tangles, regular washing and grooming support can make coat care easier to manage at home and may help with keeping the coat clean and comfortable.
Related Questions
Why does my dog’s coat keep matting so quickly?
Can I cut out dog mats at home?
How often should I brush a dog with a long coat?
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.