How to improve focus: why you can't concentrate and 7 ways to get it back

CareOps editorial team · October 28, 2026 · 8 min read

Mental wellness information and service guidance published by CareOps.

You are reading the same paragraph for the third time. You start an email, open a messenger, and suddenly another window is open. That is probably why a book title like Stolen Focus has struck a chord. Trouble concentrating is often less about weak willpower and more about sleep, mood and surroundings working together. Here is why it happens and how to improve focus starting today.

What is focus? Attention and concentration #

Focus is the ability to gather your attention on a task, hold it there for a while, and bring it back when it wanders. Psychology usually studies it under the word attention, and in everyday English people call it concentration or focus.

Focus rises and falls even within a single day. The same person concentrates differently on the morning after a good night's sleep than on the afternoon after a restless one. So rather than deciding “I just can't focus,” it helps to first notice when and why it slips.

Five common reasons you can't concentrate #

1. You're short on sleep. Attention is one of the first things to wobble when you don't sleep enough. Even a few short nights in a row can leave you foggy by the afternoon.
2. Stress and worry take up mental space. Unresolved worries keep popping up while you work and take a share of your attention.
3. Notifications and multitasking chop attention into pieces. Each time you check a message and come back, it takes time to settle in again.
4. Your mood is low or you feel anxious. Trouble concentrating often shows up alongside depression and anxiety.
5. If it has always been this way, it could be adult ADHD. Long-standing attention difficulties that show up across situations are worth looking at on their own.

If your mood has been low for weeks and you've lost interest in things, read early signs of depression. If focusing and finishing things has been unusually hard since childhood, read adult ADHD symptoms. If learning and understanding new things has been slower across the board since childhood, rather than focus alone, see borderline intellectual functioning.

What research shows: sleep, task switching and phones #

Sleep and attention: a meta-analysis of 70 studies (147 cognitive tests) on short-term total sleep deprivation of under 48 hours (Lim & Dinges, 2010) found the largest effect on lapses in simple attention, while reasoning accuracy barely changed. That is why, on short sleep, simply staying on task falls apart before harder thinking does.

The cost of switching tasks: across four experiments, alternating between two tasks added time with every switch. The cost grew as the rules got more complex and shrank when there was a cue about what to do next (Rubinstein et al., 2001). What looks like doing several things at once usually means paying a re-entry cost every time you switch.

Does just having your phone nearby matter? A widely shared “brain drain” study (Ward et al., 2017) reported that the mere presence of your own smartphone reduces available cognitive capacity. But a later replication using the same method (Ruiz Pardo & Minda, 2022) found no difference in task scores whether the phone was on the desk or outside the room. So you can't conclude that the phone's presence alone ruins focus. What does matter is that every notification you act on actually interrupts the task and creates the switching cost above.

7 ways to improve focus #

1. Keep only one task open: put just the task in front of you on screen and close other windows and tabs. Marking “this one, now” on your to-do list reduces the cost of switching.
2. Work in 25-minute blocks: focus for 25 minutes, then rest for 5 (often called the Pomodoro technique). A set end point makes starting feel lighter, and the break is when you can check your phone.
3. Notifications off, phone in another room: turn on do-not-disturb while you focus and keep the phone out of reach. Reacting to notifications and breaking off the task eats more focus than the phone simply being there.
4. Protect your sleep first: attention is the first thing to wobble on short sleep. Start by keeping your bedtime and wake-up time consistent. If racing thoughts keep you up at night, see when your mind races at bedtime.
5. Move for a few minutes: a meta-analysis of the effects of a single bout of exercise on cognitive performance (Chang et al., 2012, 79 studies) found a small but positive effect. Walk or stretch for a few minutes between blocks.
6. Lower the starting barrier: instead of “write the report,” pick a first step that takes under two minutes, like “open the file and write the title.” If starting keeps getting pushed back, our guide to procrastination looks at why.
7. Keep a worry note: when a worry pops up mid-task, write it in one line on a sheet of paper and set a time to look at it, such as “5 p.m.” Knowing you don't have to keep turning it over makes it easier to come back to the task. If the same thoughts keep circling, read overthinking too.

If your phone keeps breaking up your work, it can help to first check how much you rely on it. Our smartphone overuse self-check covers the signs of overdependence and ways to cut back.

At a glance: what to try first for each reason #

If focus stays hard for a long time: an adult ADHD self-check #

If these steps don't help after a few weeks and similar difficulties have followed you at school, work and in relationships since childhood, attention problems are worth looking at on their own. The CareOps adult ADHD self-check (ASRS) is a six-question screening check about the past six months. You can take it right away with no login, and the result is a starting point for deciding whether to look further, not a diagnosis.

If you need a place to sort out a scattered mind #

On days you can't concentrate, worries and to-dos are often tangled together in your head. CareOps Maeumi is an AI counseling app that runs sessions with approaches such as cognitive behavioral therapy (CBT) and acceptance and commitment therapy (ACT), helps you sort out what is holding your attention and set small steps to try, and remembers past sessions so the next one picks up where you left off. Get the app

This guide shares mental wellness information. If you are in immediate danger, contact emergency services where you are. Support and contact information.