Bumps on ears

[KunalC137]

Hi,
My boy Gizmo has these very hard lumps on his ears. I have attached some pictures for reference. I was just wondering what it could be and if I should take him to the vet.
Thanks a lot.

 

[lilspaz68]

Yes take him to the vet. He's got a very specific type of mite that attacks the ears, nose and feet. He'll need Revolution (selamectin) or ivermectin to treat them.

From ratguide.com
"Notoedres muris (also termed the ear mange mite) burrows into skin, and can present as yellowish crusty appearing warts on edges of ears and nose, or can appear on other extremities as reddened bumps. Both of these are not often seen in the domestic pet rat."