Red scabs along vein in ear

My minilop just went to the vet two weeks ago. He is four years old and neutered. She checked his ears, teeth, and claws and gave his annual vaccines. The vet was very impressed with his health. But today I noticed these red marks (scabs?) along a vein inside his ear, in just the 1 ear. I checked inside the ear canal and it's completely clean, checked inside his fur and also seems so clean, he also has a 4 year old lion head brother (also neutered) who constantly helps keep him clean. His brother has no symptoms by the way. He hasn't been outside yet this year either, only on our three story high apartment balcony. Could it be a mosquito bite? Or fleas? Or mites? Or is all okay? My minilop seems completely normal, relaxed, playful, eating and pooping well, and he isn't scratching it. I have attached a picture.

Bug bites, or maybe scratched too vigorously at an itch? Probably good to keep an eye on it. If it doesn't get better or gets worse, then definitely have your vet check your bun out. Could be the start of ear mites, or maybe your bun scratching excessively due to an ear infection.

Here's what to look for.

https://medirabbit.com/EN/Skin_diseases/Parasitic/earmite/Psoroptes.htm

www.medirabbit.com/EN/Neurology/Otit/otitis.htm

Check whether nails are too long and sharp, could just be self-inflicted.

It’s great to hear your minilop is healthy overall! Red marks or scabs in the ear could be due to several reasons, such as mosquito bites, mites, or even minor injuries from grooming. Since he isn’t scratching it and seems normal otherwise, it might not be an urgent issue, but I’d still recommend keeping an eye on it. If the marks worsen or you notice any other symptoms, a follow-up vet visit might be needed.

I also think it's an insect bite.