Home > Medical > PMS > News 11 October 2016 WATCH: 5 things you should know about PMS PMS is often shrouded in mystery, but we are breaking down the caricature with these 5 fun facts . . . 0 Joshua Carstens Related articles Ever wondered why you crave chocolate during PMS? It’s that time of the month and all you want is a huge chocolate bar, or two. Here's why. Why Olympic gymnasts stop getting their periods While exercise has many benefits, too much of it can be a bad thing, and some gymnasts and other professional female athletes experience a condition called amenorrhoea, or missed periods, due to their excessive training regimes. Why do some women get 'bad' PMS and others don’t? Premenstrual syndrome symptoms affect an average of 75% of women, although only between 20 and 40% experience extreme discomfort.