Please help - problem with cat's ear (photo attached)

[Lobsterquadrille2]

My beautiful girl (nearly 15) has developed a kind of bald patch on her ear. It doesn't seem to be troubling her at all; she's definitely not an aggressive cat so unlikely to have been sustained in a fight. Google suggested ringworm or sunburn. Any ideas please?

Maybe fox mange ? Can you call the vets for advice. ? They may ask you to email the pic .

@oohnicevase thank you for your reply - I did email the vet, and they say:

"Good afternoon

Thanks for your email and the photo. I cannot tell the cause of this

but at this stage, if she is not bothered by it and the patch is dry,

I would monitor only. If she is rubbing or scratching at it, if the

affected area is getting larger or becoming moist, or other patches

are appearing then please let me know."

So I'll do that!