Yes, you can hopefully reduce this hypersensitivity. It is very questionable as to whether one can regain one's previous tolerance fully. For many of us, reducing the hyper sensitivity so we can ride in the car over a bump or make a modestly quick movement is the best we can achieve.

Learning new body movements to reduce the frequency of bumping into things is important for many of us. Slower movements can be a big help at avoiding head bumps. But, life happens. Bumps happen.

My best to you.