symptoms of lack of caffeine
Top 15 Caffeine Withdrawal Symptoms. 1  Headache. A caffeine headache usually starts behind the eyes and then moves up the front of the head. 2  Sleepiness. This just isnât your normal tiredness, this is sitting up straight but still canât keep your eyes open tiredness. 3  Irritability. Everyone and everything gets on your last nerve.  Lethargy.
Some symptoms of caffeine withdrawal include severe headaches, depression and feeling sleepy. People who withdraw from caffeine too quickly may suffer severe headaches. Common symptoms of caffeine withdrawal include nausea and vomiting. Someone who is withdrawing from caffeine may suffer from insomnia.