I am 21 years old, and I havenât ever used any hair growing technique for regrowing hair. Due to an accident, there is a spot in my head towards the left, where usually I part my hair, and there is no hair in that part. I have a lot of things about Regaine for women, for regrowing hair even in their 30s and early 40s. I want to know from some expert if it can be equally effective for regrowing hair in that small spot, which I so detest! I would be thankful to you for your suitable advice, therefore, please suggest at the earliest possible!