Emotional stress comes from all sorts of relationships. Humans are a highly social species and the multitude of social relationships create a lot of emotions let that be good or bad. These emotions effect the physical body in many different ways. Bad emotions can create physical illness.
Emotions need to be in balance. Stress and anxiety can result in major health problems. In any case it is better to feel good rather than feel terrible. This statement may sound benign but talking to hundreds of people every week, you wouldn’t believe how messed up people can be.