I started with really bad cramps the other day on the left side, which told me it was time to hit the toilet. The first stool was solid but then more cramps and diaherra. All this at the airport in the USA two hours before getting on the plane. My diet hadn't been great over there and because it was so hot I kept drinking a lot of fizzy pop, big mistake! I also get really hot as well. But the sudden cramping is the main sign.