When you hide your emotions no one will no ow you are feeling and how to help you. If it's serious then you can develop some "problems". I would advise you to show your emotions. But you don't have to show all of them, truthful I only show the emotions that I need people to see, any other is just tucked away.
a chemical process in which substances act mutually on each other and are changed into different substances, or one substance changes into other substances.
