Yes, Hot Weather Can Give You A Dodgy Stomach. Here’s Why
Routines also change pretty dramatically when it’s hot – we might drink more caffeine, iced drinks or alcohol, and eat more fruit, salads, ice cream or barbecue food. “Some people also reach for sugar-free drinks or foods containing sweeteners such as sorbitol, which can have a laxative effect in larger quantities,” added Dr Ramskill.
Article source: https://www.huffingtonpost.co.uk/entry/can-heatwave-cause-diarrhoea_uk_6a842d3de4b0b3bc96f82c11