It is possible that your headaches are due to changing your diet to a vegan lifestyle. It is common to experience headaches when switching to veganism due to the drastic change in the food you are consuming. To avoid these headaches, it is important to make sure you are getting enough nutrients, especially proteins, vitamins, and minerals. Eating a variety of vegan foods, such as legumes, nuts, seeds, fruits, and vegetables, can help ensure that you are getting all the nutrition you need. Additionally, make sure you are drinking enough water, as dehydration can also lead to headaches. Finally, be sure to talk to your doctor to make sure there is no underlying medical reason for your headaches.