What are some reasons a 4 yr old would self harm?

There are many reasons a 4 year old would want to self harm. It depends on their background and their social and life experiences. Normally traumatic events cause someone to self harm - it can affect anyone.

self harming probably helps them cope with overwhelming feelings. they may have something like autism where it is not unusual for autistic children to bang there head or scratch when they are in sensory overload

Self harm is n outlet that people use to physically express their emotional and mental pain. Self harm can be seen in any age group and it is usually a sign that the person needs to talk through what is going on. As four year old, most people may think that there aren't many things that could push them to self harm, but they may have an underlying diagnosed condition such as anxiety. Anxiety could lead a child to constantly think about if they are doing enough to make the ones that they love proud. It is also possible that there are family problems that cause a child to self harm.