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.
Fortunately, natural is back into our lives’ and now we need to unlearn the past 80 years and the teachings of the industrial revolution. We need to learn the natural lifestyle that humanity survived with for the past 15 thousand years.