Nicotine Withdrawal
What nicotine withdrawal feels like
Withdrawal is your body and brain adjusting to life without nicotine. It is uncomfortable but temporary — and it is the main reason quitting feels hard in the first weeks.
Anxiety and Nervousness
Quitting can temporarily increase anxiety and tension as the body adjusts — for most people it settles within a few weeks.
Increased Appetite and Weight Gain
Many people eat more after quitting, both because appetite increases and because eating replaces the hand-to-mouth habit. Average weight gain is modest.
Difficulty Concentrating
Brain fog and trouble focusing are common in the first weeks after quitting and improve as the brain adjusts.
Constipation
The gut can slow down temporarily after quitting because nicotine used to stimulate bowel motility — usually resolves within weeks.
Cough and Throat Clearing
A temporary increase in coughing ("quitter’s cough") is common as the airways begin cleaning themselves — it usually passes within weeks.
Cravings
Cravings (strong urges to smoke) are the most common withdrawal experience. They are intense but short, and they weaken over weeks.
Fatigue and Low Energy
Unusual tiredness in the first weeks after quitting is common as the body adapts to life without a chronic stimulant.
Headache
Headaches can appear in the first days to weeks after quitting as blood flow and caffeine metabolism adjust — usually temporary.
Irritability and Anger
Irritability is one of the most consistent nicotine withdrawal symptoms, typically peaking in the first week and settling over 2–4 weeks.
Low Mood and Depression
Low mood, sadness and even temporary depressive symptoms can occur in early quitting. For most people mood stabilizes within weeks.
Restlessness
A feeling of being unable to sit still, common in the first days after quitting and usually short-lived.
Sleep Problems
Insomnia, vivid dreams and disturbed sleep are common in early quitting — and NRT patches can themselves cause vivid dreams.
Increased Appetite and Weight Change
Appetite often rises and weight can increase modestly after quitting — a well-documented trade-off that is manageable and far less harmful than smoking.
How long does withdrawal last?
Symptoms usually begin within hours of the last cigarette, peak in the first 3–7 days, and mostly resolve within 2–4 weeks. Cravings can persist longer but become less frequent and less intense. See the full quit timeline.
Two sources of information — kept separate
Every symptom page separates what science says (documented symptoms, time course, effective approaches) from what people report (community experiences, which vary and are not predictions). A community member reporting something on day 7 does not mean it will happen to you on day 7.
For the underlying science — mechanism, timing evidence, what varies and what research documents for each symptom — see the Withdrawal section of the Data Center.
When withdrawal needs medical attention
Withdrawal itself is uncomfortable but not dangerous. But if symptoms are severe, last far beyond a month, or involve persistent low mood or thoughts of self-harm, talk to a healthcare professional — quitting does not mean coping alone.
Feeling it right now?
Read how people manage this exact moment — and what the evidence supports.