Caffeine is said to produce headaches, which is somewhat accurate. Caffeine withdrawal symptoms might result in headaches. The more people drink it daily, the more addicted they become, so having a headache in the morning while addicted to caffeine is likely to occur, but this is more likely to happen to adults and older people because the body changes as you age and reacts differently to different foods. According to an article I read, "The blood vessels in the brain dilate, or swell, in certain types of headaches." Pain is caused by their expansion into the surrounding tissues. Some headache discomfort can be reduced or even reversed by consuming coffee, which narrows the arteries. Ironically, headaches might result from abruptly cutting back on daily caffeine intake. It sets off a chain of actions that result in dilated blood vessels and, ultimately, headache discomfort. Those who frequently consume caffeine can reverse their headaches by increasing their intake; however, this can lead to addiction, and the more you consume, the more difficult it will be to quit or the more severe the withdrawal symptoms will be.