Is Noel your only rabbit or is there another rabbit Noel interacts with? If there is another rabbit, this is something commonly seen when one rabbit is ripping off the fur of another, specifically during humping, and is a sign that these rabbits should be separated. You can review proper bonding procedures here: https://binkybunny.com/infocategory/bonding/
If he is a single rabbit, this could potentially be molting if he is molting right now and the skin is completely healthy looking (hard to say from the photos). If not, I would check the environment for any snag hazards and I would recommend a vet visit.
Also, just wondering… The fur on the head looks unusual—Perhaps it’s just the angle? It looks very tuffed/mop-like? Is there something going on w/ Noel’s head fur?
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.