Hi and welcome!
That's something you need to see a physician about. Please say so to your doctor next time you go in and ask for a referral ... perhaps a plastic surgeon. I don't know that anything will make you grow hair there, but there might be a way to fix it.
If you feel like you might be too embarrassed to ask, write it out on a sheet of paper. Then, if you simply can't get the words out, hand over the note. Trust me ... all doctors (all people) have something they'd like to fix too. They understand. If they don't ... time to get a new doctor!