What happens when you suppress your emotions , your feelings?

Great topic. Suppressing emotions implies some degree of control over them and the ability to decide on how to respond. There is an additional level, when you no longer have the ability to even suppress. My best examples of that is when panic stricken, and when there is no escape. It doesn't have to be a physical threat that renders one unable to respond, unable to mask their true feelings. Like one is trapped in the fight or flight state and the choice of which is no longer left to the person.