Guide: matted dog hair
Matted Dog Hair: How to Remove Mats and Stop Them Coming Back
Matted dog hair is more than a cosmetic problem. Mats pull on the skin, trap moisture and dirt, and can hide sores. Small tangles can be brushed out at home. However, tight mats should be clipped off by a groomer or a vet, and never cut out with scissors.
What causes matted dog hair
A mat is a dense knot of loose and living hair. PetMD’s veterinary guide lists five main causes (PetMD):
- Brushing too seldom, so loose hair builds up
- Moisture from baths, swimming, rain or licking
- Shed undercoat that gets caught in the outer coat
- Friction from collars, harnesses, bedding and movement
- Licking or scratching at itchy skin
Long and thick coats are the most prone. Poodles and their mixes are high on that list, because the hair they shed stays in the coat instead of falling to the floor.
Where mats form first
- Behind the ears
- Under the collar or harness
- In the armpits and under the legs
- Between the toes
- Around the tail and hindquarters
Check these spots with your fingers every day. A mat usually starts as a small lump close to the skin, where a quick surface brush does not reach.
Why matted dog hair is a health problem
Mats pull on the skin whenever the dog moves, so walking and lying down become uncomfortable. In addition, PetMD notes that mats trap moisture, debris and dirt against the skin, which can lead to irritation and a skin infection.
Groomers see the results. As one certified master groomer told PetMD, sores, injuries and bugs can all hide under a matted coat (PetMD).
How to remove matted dog hair safely
- Do not bathe first. VCA Animal Hospitals warns that tangles can become impossible to remove after a bath (VCA).
- Mist the coat lightly with water or a detangling spray made for dogs.
- Hold the hair at the base, so you do not pull the skin.
- Tease the tangle apart gently with a slicker brush, as the ASPCA advises, working on a little at a time.
- Stop if your dog is in pain. Take a break, or hand the job to a professional.
Never use scissors. PetMD explains that mats can sit surprisingly close to the skin, so it is hard to tell where the hair ends and the skin begins. If the dog moves, you can cut them.
When to see a groomer or a vet
VCA says extensive mats may have to be cut out with clippers, and that severe matting calls for a professional groomer or your veterinarian. Go to the vet first if the skin under a mat is red, wet or smelly, or if your dog will not let you touch the area.
A badly matted coat may need to be clipped short. That is the kind choice. As the groomer quoted by PetMD puts it, “humanity before vanity.” The coat grows back, and you can start fresh.
How to prevent mats with line brushing
VCA advises daily brushing for dogs with long, silky or curly coats. The method matters as much as the schedule. Line brushing reaches the skin:
- Push the coat up with one hand until you see a line of skin.
- Pat the brush into the hair just below that line.
- Pull the brush gently away from the body.
- Move the line down a little, and repeat.
Afterward, run a metal comb through each area. If the comb glides from the skin to the tip, the coat is clear. Also brush before every bath, dry the coat fully afterward, and keep regular grooming appointments. Our Goldendoodle grooming and Havapoo grooming guides give a full routine.
Related guides
- Havapoo Grooming: Brushing, Haircuts and a Simple Schedule
- First Grooming Appointment for a Puppy: When to Go and What to Expect
- Puppy Coat Change: When Puppies Lose Their Puppy Coat
- How to Trim Puppy Nails Without Hitting the Quick
- Dog Paw Care: Pads, Nails, Hot Pavement and Winter Salt
See all our puppy guides, or meet our Havapoo puppies for sale and Goldendoodle puppies for sale.
Sources
- PetMD (Jenny Alonge, DVM). How To Handle Matting in Dogs and Cats. petmd.com
- PetMD. Dog’s Hair in Knots? How to Get Them Untangled and Under Control. petmd.com
- VCA Animal Hospitals. Grooming and Coat Care for Your Dog. vcahospitals.com
- ASPCA. Dog Grooming Tips. aspca.org
Sources were checked on October 7, 2026. This article is general information and does not replace advice from your veterinarian.
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