I get horendous headaches. I drink more of whatever I'm fasting on (juice, water, master cleanse), go to sleep, try to have a bowel movement, enema. These all help to clean out toxins. If you were not putting healthy things into your body before you started, that is waht is giving you he headaches. Honestly, going to sleep is the best one for me because I'll have a bm the next day and feel better, but I know that's not feasible sometimes.