According to Mayo Clinic, chronic insomnia is frequently a result of stress, habits, or life events that interrupt sleep. Stress is a normal part of life, and every person has different stress triggers. According to WebMD, 40% of American workers admit to experiencing work-related stress, and one-quarter state that their work is the biggest source of stress in their lives. Aside from work stress, many people also experience life stresses, such as the death of a loved one, traumatic events (i.e., rape, abuse, natural disasters, etc.), and increased financial obligations. So, what's the link between stress and insomnia? Research indicates that there's a close link between stress and insomnia. Stress triggers the excessive secretion of cortisol and negatively affects the activity of the HPA and SAM systems, which negatively affects sleep.