Withdrawal symptoms refers to unplesant psychological, mental or physical feeling when an individual stops or discontinue the use of something that had become habitual or which the individual had been addicted to.
Withdrawal symptoms is surge of adrenaline that results into unpleasant feelings and symptoms as the brain is trying to adjust to the change in the addiction.
From the question, Laura gets a headache whenever misses her daily cups of coffee because she had been addicted to early morning cup of coffee and more cups throughout the day
