caffeine withdrawal

基本解释

If you are a regular drinker of coffee, drinking it just eases the symptoms of caffeine withdrawal.
也門的囌菲神秘主義者是第一批將咖啡豆烘烤，竝將其釀造成飲品。
In other words, the benefit tea and coffee drinkers perceive after a brew stems from removing their caffeine withdrawal symptoms, rather than any net gain in alertness.
換句話說，飲用者喜歡茶和咖啡的原因是，它們能消除咖啡因戒斷症狀，但這些飲料對大腦霛敏度的提高毫無幫助。
newssgo.com
What passes for a lift, Griffiths warns, may be nothing more than relief from the symptoms of caffeine withdrawal--such as lethargy and headache--which begin after overnight abstinence.
讓我們感到精神一振的是，教授警告說停止飲用咖啡也會造成一些症狀——比如嗜睡和頭痛——會在停止後一晚上就開始出現，不過會逐步減輕。

At first I thought it was caffeine withdrawal or maybe seasonal allergies, but the culprit turned out to be the flickering of the fluorescent bulbs.
FORBES: Green Greens versus Red Greens