When large numbers of yeast and fungal cells are rapidly killed, a die-off (or Herxheimer reaction) occurs and metabolic by-products are released into the body.  The experience of candida die off depends on the amount of candida in the body. The more you have, the more you will experience symptoms. Drinking plenty of water helps. Other things to keep in mind are staying away from sugar completely is generally easier than having just a bit. Also stay away from coffee since that can create sugar cravings.