Shaving does that too some people. My skin never accepts shaving. It tends to make my hair grow thick too. Waxing is the best solution for hair removal as far as i know. I was waxing before and never faced an issues. These days i use Fem Hair removal cream which comes with anti-darkening moisturizer. And i am happy with the product. It's easy and my skin is cool with that. No issues. In fact after applying the moisturizer cream my skin becomes bright instantly. I use it for 3 days after hair removal. Give a try.