Not all people suppress negative emotions. Some people will take their frustration and anger out on others verbally or physically; others may become depressed or anxious; some will work out at the gym or do other exercises to get their negative emotions in check. For those that suppress negative emotions they may want to keep their feelings to themselves because they may feel if they do not control these negative emotions they may well lose mental control and fear what they could be capable of doing. Most humans by nature either figure out their negative emotions by seeking help from a profession or discussing those negative emotions with a friend.
