Originally Posted by lukew

With these symptoms, by far the most likely cause is norovirus. We're in the norovirus season at present. Think of it as the common cold of the gut. It is indeed extremely unpleasant at the time but as you have reported above, normally resolves within 24-48 h. People often associate it with travel but that is because it is highly infectious and when we travel we come into contact with lots of other people.