Headache After Quitting Coffee? The Truth About Caffeine Withdrawal You Did Not Know

Modern medicine can explain Donguibogam's 'insufficiency of brain marrow' through more specific biochemical and neurological mechanisms. Caffeine works by blocking 'adenosine receptors' in our body. Adenosine is a substance that suppresses brain activity and dilates blood vessels to induce drowsiness; when caffeine interferes with this action of adenosine, the brain maintains an arousal state and cerebral blood vessels constrict. The problem occurs when we consume caffeine continuously. The brain attempts to maintain balance by increasing the number of adenosine receptors. Then, if caffeine intake is stopped abruptly, the previously suppressed adenosine pours out all at once and binds explosively to the receptors. As a result, cerebral blood vessels dilate much more strongly than usual, compressing surrounding nerves and triggering inflammatory reactions that cause severe headaches. This is the so-called 'rebound vasodilation' phenomenon. In addition, caffeine promotes the secretion of neurotransmitters such as dopamine and norepinephrine to create a pleasant and energetic state, but when caffeine intake stops, the balance of these neurotransmitters is disrupted, which can be accompanied by fatigue, lethargy, impaired concentration, and, in severe cases, feelings of depression. It is as if the brain fails to adapt to the sudden change and sends out an emergency signal. Although these withdrawal symptoms vary by individual, they usually begin within 12 to 24 hours after stopping caffeine intake, peak at 20 to 48 hours, and can last for more than a week in prolonged cases. Simply enduring it is not the best answer. We must understand the emergency signals sent by our body's complex nervous system and respond wisely.