My rabbit has scab-like bumps on his cheeks, what are they?

They don't sound normal. Here's a link with info a href="http://www.bio.miami.edu/hare/furloss.html#abnormal" rel="nofollow"http://www.bio.miami.edu/hare/furloss.ht…/a Maybe it will help you narrow down what's going on with your rabbit.