Today we're addressing a question from folks with uteruses who find themselves spending way too much time in the bathroom once a month.

Despite thousands of years of pant-crapping history, there's a surprising amount we don't know about diarrhoea. There's a couple of ways we've figured out how to treat the symptom. But a lot of scientists' understanding of diarrhoea -- from illnesses such as traveller's diarrhoea -- is more based on intuition than data.