Dr. Leigh Erin Connealy, from the Center for New Medicine in Irvine, California, has developed valuable insights into the common patterns and triggers that often emerge before a cancer diagnosis.

Over her 32 years of guiding patients through their cancer journeys, she has consistently observed a significant link between emotional well-being and physical health — with stress standing out as a recurring factor.

The Mind-Body Link: Stress as a Hidden Contributor

When patients come to her for help, Dr. Connealy’s focus isn’t solely on treating the cancer itself. Instead, she aims to support the person as a whole. Through her integrative and holistic care approach, she has found that stress frequently precedes the onset of cancer.

According to her, many of her patients endured long periods of emotional or mental strain before their illness appeared. This stress may stem from high-pressure jobs, personal or family issues, life-altering events, or deep emotional wounds.

The Physical Impact of Stress

Often, stress is thought of as purely emotional or mental. However, in reality, stress is a biological process involving specific hormones — cortisol, epinephrine (adrenaline), and norepinephrine (noradrenaline). When we encounter a stressful event, our body activates a chain of responses via the hypothalamic-pituitary-adrenal (HPA) axis.

This leads to increased levels of cortisol, the main stress hormone. When stress becomes chronic, it can interfere with regular body functions, weaken immune defenses, and heighten inflammation — all of which may reduce the body’s ability to detect and eliminate abnormal cells, potentially raising the risk of cancer.