Some of the most common health complaints may be connected by a single hormone working behind the scenes. Doctors say cortisol, a hormone essential for regulating metabolism, immune response and blood pressure, can cause widespread effects when levels remain elevated for too long.
Chronically high cortisol has been linked to symptoms that may seem unrelated at first, including unexplained weight gain around the midsection, muscle weakness, rising blood pressure, sleep disruption and facial puffiness. While cortisol naturally fluctuates throughout the day, prolonged elevation can place the body in a constant stress state, affecting multiple systems at once.
Experts note that stress is only one possible factor behind high cortisol, with illness, poor sleep, inflammation and certain medical conditions also playing a role. Because symptoms can overlap with other health issues, doctors recommend medical evaluation when changes are persistent, worsening or interfering with daily life.
SOURCE:
Prevention, January 21, 2026