My cat has a bald spot on the top of her head about the size of half a penny but perfectly round. What could be the cause?

Not self-inflicted. No scratch/itch eczema-like marks. Plus, she couldn't possibly reach it!

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Hair loss is a very non-specific symptom; there are many conditions that can cause this so you’ll need to have your cat checked by your vet to work out which is the culprit. One possibility is a dermatophyte or skin fungal infection, which is more commonly known as “ringworm”. This can be spread to people so check your skin too; it often looks like a red round lesion and may be a bit scaly on the top. Cats can be allergic to mosquito bites but the top of the head isn’t the most common site for this. Demodex infestation is also not common but can present this way. Bacterial infections can cause hair loss too.

You can expect your vet to do a number of tests to diagnose the cause of your cat’s bald spot. Skin scrapings, hair plucks and sticky tape impressions can all give them more information and allow them to instigate an appropriate treatment plan.
| 08.17.16 @ 11:32
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$commenter.renderDisplayableName() — {comment} | 11.17.17 @ 17:42
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