The book says that problems that you've had before with your body that happen consistently will get not better but worse with the diet because your body is trying to eliminate this toxins or what ever it is you have, but don't get discouraged, just keep on doing the diet. There isn't anything you can take cause as the book says you shouldn't take any vitamins or drink any type of pill what so ever while being on the diet. So don't. There's times my body starts to ache as well, but I just try to ignore it and keep on going with my day, usually I'll fall asleep early so next time comes soon and I'm on a different day of the diet. Heh. Today is day 8 for me and I can't believe I've come this far. Just 2 more days and I'm so done! I'm glad I've gotten this far. Well good luck to you and don't give up! Peace.