Hi I have the same problem! Only it's my right breast! It's mainly the nipple area. It drives me nuts! I have no idea what it is. I'd love to hear what your mother's doctor thinks it might be also!
I dont think that hair growth will help you in that department. my grandmother is going through the same thing. she will find out what is wrong (if anything) later on. she had a mamogram done but her doc says that its probably nothing. i will message you with the results of her test when i get them. best of luck tho.