It is a question I am asked more often than you might expect. Patients diagnosed with gallstones frequently want to understand why — and stress is often at the top of their list of suspects. Life has been difficult, work relentless, sleep poor. Could that have contributed? The honest answer is: possibly, yes — though not always in the way people assume.

What Are Gallstones?

Gallstones are solid deposits that form inside the gallbladder when the chemical balance of bile is disrupted — most commonly when bile contains too much cholesterol, which crystallises over time. They range from the size of a grain of sand to a golf ball, and can exist for years without causing symptoms.

The Established Risk Factors

The Role of Stress

Stress and Cortisol

Under prolonged stress, the body produces sustained elevated levels of cortisol. High cortisol has been shown to affect cholesterol metabolism — increasing the amount of cholesterol secreted into bile and creating the kind of composition more likely to form stones.

Stress and Gallbladder Motility

The gallbladder needs to contract regularly to prevent bile from becoming stagnant. Chronic stress is known to affect gut motility through the gut-brain axis. Stress signals can slow gallbladder emptying, contributing to bile stasis and increasing the risk of stone formation over time.

Stress and Lifestyle

There is also an indirect relationship. Chronic stress frequently leads to the patterns that independently increase gallstone risk — poor sleep, irregular eating, a diet high in processed foods, reduced physical activity, and significant weight fluctuation. These factors compound one another.

What the Research Shows

Studies have found associations between psychological stress and gallstone disease, though establishing direct causation is complex. Research has identified links between stress-related hormonal changes and altered bile composition. Animal studies have demonstrated more directly that chronic stress can accelerate stone formation. Stress is unlikely to cause gallstones in isolation — but in someone who already has other risk factors, it may well be a contributing element.

What To Do

If you have been diagnosed with gallstones and are under significant stress, it is worth addressing both. Managing stress through regular physical activity, adequate sleep, and professional support where appropriate is beneficial for overall health and may reduce the compounding effect on gallbladder disease.

If you have upper abdominal pain after meals, nausea, or symptoms that come and go — particularly during periods of high stress — it is worth getting assessed. Gallstones are straightforwardly diagnosed with an ultrasound and, if symptomatic, are very effectively treated with keyhole surgery.