Some people find that they suffer from headaches when they consume CBD-based products. The reasons why this might be are unclear, however. It could just be that some people's physiologies are different and that they will get a headache whenever they consume them. Therefore, you should never consume too many CBD-based products, such as gummies, in one go, particularly if you are new to them and do not know how they will affect you. If you get a headache, then stop consuming them and drink plenty of water. Some people think that it is likely that poor quality cannabidiol products lead to headaches, but it could be that the dosing is wrong, something that can happen if you are measuring out a CBD oil by hand, for example. Equally, some people suggest that cannabidiol helps to kill off toxic brain cells, which, in turn, leads to temporary headaches as they have an overall beneficial effect.