Caffeine and Headaches | Caffeine Addictions

The most common occurrence of headache is due to blood vessels increasing in size and they gradually wreak havoc on the nerves surrounding them. So most of the headache relievers focus on bringing the blood vessels back to their normal size. Caffeine in small amounts can help to achieve this as it acts asvasoconstrictor.

But the darker side is caffeine when used in large amounts especially along with sugar can backfire and cause expansion of blood vessels and thereby resulting in headache.