Keeping this in consideration, why can't I stop laughing?
Pseudobulbar affect (PBA), also known as emotional incontinence, causes people to laugh and/or cry uncontrollably at any given moment. People who suffer from the condition find themselves reacting this way, even though there might be little or no trigger.
Furthermore, why do I laugh in serious situations? Displaying nervous laughter at a serious situation can project you as an insensitive, rude, arrogant person and put you in an awkward situation. It is caused due to anxiety and stress and is your body's natural reaction to calm you down.
Just so, what to do if someone is laughing at you?
See if they are really laughing.
Why do I laugh at sad things?
Responding with laughter in deeply sad circumstances, for otherwise healthy people, is called an inappropriate affect — meaning, an emotional response to a stimulus that is either incongruous, or not quite as acute as it should be. Nervous laughter is not genuine; rather, it happens out of fear, discomfort or stress.
