Do you get headaches now that you are on the HCG Diet? Pounding Headaches have been a problem for people on the HCG Diet since it was first created. I personally think that it's a mixture of 2 things, the low amount of calories that you are eating, and withdrawal from sugar, caffeine, or other food additives. As for me, I seem to get headaches if I am on the run and have not eaten very much that particular day - So it only makes sense to assume that this would happens to people while on the 500 Calorie Diet . Now, if you are getting headaches during the diet, they should go away after the first week. This is what Dr. Simeons says about headaches in his book Pounds and Inches: A new approach to obesity. "In fact the only self-medication we allow is aspirin for a headache, though headaches almost invariably disappear after a week of treatment, particularly if of the migraine type." So according to Dr Simeons, if you do get find yourself getting headaches while o...