@smolbaka @VoidR a simple mean of domestical abuse without any marks is to leave the child outside on the balcony during the night. Nothing more is needed. The child (or anybody) can die if it's too cold , too hot or under heavy sun. If you are put in an exposed place with no mean of protection, you can die relatively easily.
This has already happened quite a few times IRL: the child was "annoying" so the parents put it on the balcony to punish him and left him here. If it's only a few times, there won't be too much damage (but it's still child abuse), but if it's done repeatedly (like here) the health will slowly deteriorate.