Digestive problems are on the Candida List of symptoms:
'Digestive problems - diarrhea, constipation, abdominal distention, bloating or pain, gas, mucus in the stools, hiatal hernia, ulcers, suffering from bacteria, i.e. salmonella, E. coli, h. pylori, IBS, Crohns etc." http://tinyurl.com/Iodine-Candida