If they are hitting you for no reason or hitting you hard enough to leave bruises, it is considered illegal. However, MY parents are strict so when I was younger and misbehaved I got one hard whooping (idk if I spelled that right) with the shoe that OCCASIONALLY left a small bruise. Some parents can just be very strict and harsh. If yours is like that, your just one of us unfortunate kids lol. If it’s like constantly leaving a bruise though, you may need to tell someone. Especially if you did nothing. I hope your okay!!