1. Stress
Stress is a powerful emotion that can wreak havoc on the body if left unmanaged. When you experience chronic stress, your body produces more cortisol—a hormone that, in excess, can suppress your immune system, raise blood pressure, and increase the risk of heart disease. Common sources include workplace demands, financial worries, or family pressures. Over time, these effects can become serious health risks. For more on the impact of stress, visit the American Psychological Association.