I had the skull sinking, and in April had it repaired with a cranioplasty. Even though it is cosmetic (to some degree) the insurance company paid for it because of the MRI showing missing areas of skull. I had the uneven ups and downs around the sinking area and they smoothed those out (sort of). The surgeon’s skill at repairing the skull bone is the cause of bumps or dents, but it might also be the cement they used to fill in the cracks, or if they used a titanium plate to cover the skull. In my case the cement had deteriorated, as well as the surrounding bone, since I have osteoporosis. But I am 20 years out from the craniotomy and aneurysm rupture, so it’s more understandable than you being 2 years out. It’s worth a call to the neurosurgeon to find out what they think. If you dont know, I would ask that they describe in depth how they fixed the skull, what products they used, what the condition of the bone was in before they closed. I didn’t have the skin changes you describe or the itching. I wonder if you are allergic to something they used? if it bothers you, it is worth reporting. MY hair has thinned over the years, so covering it wasn’t working!