Hello everyone! Tell me at what age did your babies start crawling? (Q…

Hello everyone! Tell me at what age did your babies start crawling? (Question for those who didn't raise children and they started crawling themselves) The second question, my daughter bit herself, there is a wound now, it hurts to feed her, what helps heal the wound faster? (I am applying petroleum jelly, I can't stop breastfeeding on the chest because I have two children, each one breastfeed)