Day 13 without smoking
Quit smoking day 13: low energy and the afternoon slump
Around day 13, some people feel more energy, while others still feel flat in the afternoons. Tiredness is a less common withdrawal symptom. The afternoon used to have a built-in cigarette break, so the slump can feel like a craving. Moving for a few minutes can help with both.
What is going on around day 13
NHS guidance says your energy will be increasing from around 72 hours after your last cigarette, and that circulation improves over two to twelve weeks. The National Cancer Institute lists fatigue among the less common withdrawal symptoms. So both are possible on day 13: more energy overall, with flat patches in between.
The afternoon can be a low point whether you smoke or not. When you smoked, a cigarette break gave that dip a shape: a few minutes outside and a change of scenery. Without it, the dip is just a dip, and your mind goes looking for the old fix. Smokefree.gov names work breaks among the moments people link with smoking.
Smokefree.gov suggests moving for a few minutes when a craving hits, like walking, jogging or climbing stairs, and changing what you are doing right away. Keeping the break and changing what happens in it gives you the rest without the cigarette.
The hard part
The hardest part of day 13 for many people is the middle of the afternoon. Energy drops, focus drifts, and the old break used to arrive right on time. Skipping the break entirely can make it worse, because then you are tired and have nothing to look forward to. Keeping the break and changing what happens in it is often easier.
If it hits at this momentHow to take a break at work without smokingOne thing for today
Move your hardest task to the morning today, so your afternoon low point lands on lighter work.
Day 13 in BeQuit
BeQuit's journey has a short lesson and one small task for every day of the program.
The afternoon dip
The afternoon slump is real. Plan for it.
✓Schedule a short walk or snack in your usual afternoon low point.
Questions
Why am I so tired two weeks after quitting smoking?
The National Cancer Institute lists fatigue as a less common withdrawal symptom, and poor sleep in the first weeks can add to it. NHS guidance says energy increases after the first few days, but people vary. If tiredness is severe or lasts well beyond the first month, check with a doctor.
Does exercise help with cravings after quitting?
Smokefree.gov suggests moving for a few minutes when a craving hits, like walking, jogging or climbing stairs. The National Cancer Institute suggests an enjoyable physical activity, such as a walk, for irritability. It does not need to be a workout. Even a few minutes counts.
Sources
- NHS Better Health: Quit smoking
- National Cancer Institute: Handling withdrawal symptoms and triggers when you decide to quit
- Smokefree.gov: How to manage cravings
- Smokefree.gov: Know your triggers
Last reviewed October 12, 2026. Everyone's first days are different. BeQuit is not a medical device and does not give medical advice. Talk to a doctor or a quitline about medication and nicotine replacement.
The whole timeline, from 20 minutes to 15 years