Rabbits can indeed carry lice, and symptoms would include discomfort causing scratching. This is certainly not the only reason for scratching like this, but could be one reason. In fact, in domestic rabbits, lice is actually pretty rare. A true diagnosis should be made by a veterinarian for proper treatment to begin, as rabbits are sensitive to many medications and they should not be used when not necessary.
Treatment includes a topical prescription medication you can get from your vet called ivermectin, used about 3 times with a 2 week break in between treatments.
Good luck with your rabbit,