Hair regrowth after shaving can be excruciatingly itchy. Also because you get tiny scratches on your skin when you shave, it can lead to ingrown hairs and shaver rash. There is no minimum age for waxing. It does hurt a little – kind of like tweezing your eyebrows. If you absolutely can't ask your mum to take you to a waxing salon, you can try a hair removal cream so long as you are careful not to get it on the non-hair bearing areas. Also, you can try some soothing skin creams or lotions for after shaving.