Why does my dog have dandruff and broken hairs in one area?

Read time: 3 minutes

Overview

Dandruff and broken hairs in one area can happen for several reasons, and ringworm is one possible cause. It can also be linked to rubbing, scratching, parasites, a minor skin infection, or a patch of dry, irritated skin. You usually can't tell the exact cause from appearance alone, so it's worth checking the area closely and watching for changes.

Things To Check

1. See whether the patch is circular, spreading, or staying in one place.

2. Look for redness, scabs, crusting, discharge, swelling, or any broken skin.

3. Check whether your dog is scratching, licking, or rubbing the area more than usual.

4. Feel whether the skin is warmer than the surrounding coat or seems sore.

5. Notice if other pets or people at home have any new itchy skin patches.

6. Think about whether the problem started after grooming, a bath, a new collar, or time outdoors.

7. Part the coat in and around the patch to see if there are more small flakes, broken hairs, or bald spots nearby.

Common Causes

Ringworm is one possible cause, especially if there is a round patch with broken hairs and flaking skin. Despite the name, it's a fungal skin infection rather than a worm.

Dry skin or mild coat damage from grooming, rubbing, or scratching can also leave a localised flaky patch with broken hairs.

Parasites such as mites or fleas may cause a similar look if your dog is irritated enough to scratch or chew one area.

A bacterial skin infection or another underlying skin condition can also cause dandruff, hair breakage, and patchy coat changes.

What To Do

Keep an eye on the patch over the next few days and note whether it is changing in size, shape, or comfort level.

Avoid picking at flakes or scabs, and try not to bathe the area too often unless your vet has advised it.

Wash your hands after handling the area, especially if there are children, other pets, or anyone else at home with skin concerns.

Clean grooming tools, bedding, and any shared fabrics regularly so you can reduce the build-up of loose hair and skin debris around the house.

If your dog is rubbing at the area, try to work out what might be causing friction, such as a harness, collar, or repeated scratching.

When To Contact A Vet

Speak to your vet if the patch is spreading, your dog is uncomfortable, the skin is broken or oozing, or other pets or people at home start showing similar skin changes. A vet can check for ringworm and other skin causes more reliably than looking at the coat alone.

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