There are many reasons why babies like to eat their hands, the most common of which is the usual habit of eating hands, caused by the subconscious brain of the child. Every child will be born eating milk, the mouth will have chewing action, the child’s hand can move freely, the brain subconscious will unconsciously show, not a pathology, and do not need to be treated. The subconscious mind can be suppressed as the child grows older, and the hand-eating action can be relieved, and hand-eating is also a way for the child to seek self-soothing. In addition, there is another common condition, due to the lack of trace elements of zinc in infants, such as omnivorous habits, can also lead to children love to eat hands. You can go to the hospital for a zinc test to confirm the diagnosis, and after a clear diagnosis, timely supplementation of trace elements of zinc will help to relieve the situation of hand-eating caused by zinc deficiency.