Mentis- Night is when your mind finally has space, so unfinished thoughts rush in.
- Move thinking to 7pm: write the worries and one next step for each.
- Write tomorrow's to-do list before bed to close open loops.
- In bed, focus on slow breathing or a dull mental task, and get up if it's not working.
Why does overthinking get worse at night?
All day, something is holding your attention: work, family, traffic, your phone. At night those anchors disappear. You're lying still in the dark with nothing to do, and your mind does what minds do with free time: it scans for problems.
Tiredness makes it worse. When you're tired, the parts of the brain that put things in perspective work less well, and the alarm system works just fine. That's why a 3am worry about money feels like a crisis and the same thought at 10am feels manageable.
The evening routine that calms a busy mind
- 7pm: worry session (15 minutes). Sit with a notebook. Write every worry. Next to each, write the smallest next step and when you'll do it, or "can't act on this, letting it rest". Carney and Waters called this constructive worry and found it lowered mental arousal before sleep. The worry timer guides you.
- 9pm: close the day. Finish work, put the laptop in its bag, and mute the office and family groups. The Mentis activity "Shut The Laptop Properly" turns this into a small ritual.
- 30 minutes before bed: tomorrow's list. Five minutes, specific tasks. In Scullin's 2018 study, this helped people fall asleep about nine minutes faster.
- Last hour: low stimulation. Dim light, a paper book, a shower, gentle music. No news, no arguments, no reels.
- In bed: breath, not thoughts. In for 4, out for 6 to 8. When a thought comes, label it ("planning", "worrying") and return to the breath.
What to do when a thought won't let go
Write it, park it
Keep a notebook by the bed. If a thought keeps coming back, write it with "tomorrow, worry window" next to it. Your brain lets go more easily once it trusts the thought won't be lost.
Use the "not now" rule
Worry postponement, first studied by Tom Borkovec in 1983, works by training your mind that worry has a time, and it isn't now. You aren't saying the worry doesn't matter. You're saying it matters enough for a proper slot in daylight. In the Mentis Overthinking plan this chapter is called Not now.
Give your mind something boring
Try cognitive shuffling: pick a word and picture random objects starting with each letter. Or count breaths backwards from 100. These tasks are absorbing enough to crowd out worry, and dull enough to let sleep arrive.
Get up if you're spiralling
If you've been awake and thinking for what feels like 20 minutes, get up. Sit in dim light, write the thoughts, read something easy, then go back when sleepy. Staying in bed teaches your brain that bed is for thinking.
What kinds of night thoughts are most common?
- Replaying the day: what you said in the meeting, the text you sent. See replaying conversations.
- Tomorrow's what-ifs: what if the presentation goes badly. See what-if thoughts.
- Relationship worries: why did they reply so short. See overthinking in relationships.
- Self-criticism: everything you did wrong. See the inner critic.
- Worry about sleep: "I'll be wrecked tomorrow." See sleep anxiety.
How Mentis helps
Mentis gives your night thoughts somewhere to go. Tap Rant and say everything out loud or type it, and Mimi will pick out the themes so they're there in the morning. The Overthinking plan builds your worry window and "not now" habit over a few weeks. If sleep itself has become the problem, the Sleep plan's chapter The 3am mind picks up from there. For more sleep-focused steps, see can't sleep due to overthinking.
Frequently asked questions
Why does my brain overthink at night?
At night your brain finally has nothing else to focus on, and tiredness makes it harder to let go of worries. Problems also feel bigger late at night, so thoughts loop more easily.
How can I stop overthinking in bed right now?
Breathe in for 4 and out for 6 to 8 for a few minutes, write the thought down with a time to deal with it tomorrow, and if you're still awake after about 20 minutes, get up and do something calm in dim light until you feel sleepy.
Does journaling at night help with overthinking?
Yes, especially if it's structured: write each worry and one next step, or write tomorrow's to-do list. Avoid long emotional writing right before bed if it stirs you up; do that earlier in the evening.
Can overthinking at night be ADHD?
A busy, restless mind at night is common in ADHD, but it's also common with stress and anxiety. If it's lifelong and comes with focus and organisation difficulties during the day, consider an assessment with a professional.
- Scullin MK et al. (2018). The effects of bedtime writing on difficulty falling asleep. Journal of Experimental Psychology: General 147(1).
- Carney CE & Waters WF (2006). Effects of a structured problem-solving procedure on pre-sleep cognitive arousal in college students with insomnia. Behavioral Sleep Medicine 4(1).
- Borkovec TD et al. (1983). Stimulus control applications to the treatment of worry. Behaviour Research and Therapy 21(3).
- Zaccaro A et al. (2018). How breath-control can change your life: a systematic review on psycho-physiological correlates of slow breathing. Frontiers in Human Neuroscience 12.