Intrusive Thoughts: A Practical Guide & Free Worksheet
I’m a clinical psychologist and I use cognitive behavioural therapy – combined with other therapeutic approaches – in my work with children, teens, and parents. In this guide, I will share clear, practical ways to handle intrusive thoughts and unwanted thoughts. I also include a simple worksheet you can use straight away.
If you’re dealing with intrusive thoughts yourself, or you’re supporting a child who is scared by them, you’re in the right place. These thoughts are surprisingly common, and there are helpful steps you can take.
You can also get my free intrusive thoughts worksheet sent straight to your inbox.
What are intrusive thoughts?
So, what are intrusive thoughts? They are unwanted ideas, thoughts or mental images that pop into your mind without warning. They often feel upsetting, shocking, or confusing.
Intrusive thoughts can affect adults and children. Some are just irritating, while others feel intense and sticky, like they will not let go. Either way, it can help to remember this: having intrusive thoughts doesn’t say anything about your character, your values, your safety, or indicate a mental health condition.
For many people, the hardest part is the meaning they attach to the thought. If your brain throws up a scary idea, you might assume it must be important. In reality, it’s often just noise from an anxious mind under stress.
CBT techniques can help; CBT teaches you to notice intrusive thoughts, test them, and respond in a different way. That matters when you’re trying to work out how to stop intrusive thoughts from taking over your day.
Examples of intrusive thoughts (and intrusive images)
Intrusive thoughts come in many forms. Some show up as sentences in your mind. Others arrive as pictures, flashes, or short scenes, which can be disturbing images. That can feel alarming, especially for children, because images can seem more real than words.
Here are some examples of intrusive thoughts I often hear about:
- Safety fears: sudden thoughts that you or someone you love will get hurt, even when things are safe. This includes the high place phenomenon – the sudden urge to jump from a height.
- Violent thoughts and images: unwanted pictures of hurting someone, even though you would never choose to do that.
- Forbidden or upsetting thoughts: ideas that feel wrong or embarrassing.
- Health worries: repeated fears about having a serious illness, even after reassurance.
- Perfectionism: pressure for things to feel “just right”, sometimes with the fear that something bad will happen if they are not.
- Relationship doubts: fears about loyalty or love, without clear evidence.
- Blasphemous thoughts: unwanted religious doubts or sacrilegious ideas that clash with your beliefs.
The content of the thought is often less important than the pattern: the brain throws out a scary idea, you feel distressed (ashamed, guilty, or a mix of other emotions), then you try to fix it, check it, or push it away, and the thought comes back stronger.
That loop is what we want to interrupt.
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Intrusive thoughts worksheet (how to use it)
I’ve created a simple intrusive thoughts worksheet PDF that helps you practise new responses. It’s designed for adults and teens. For younger children, you can adapt it by doing it together, using simpler language.
Here’s how I suggest using the worksheet:
- Begin with the strategy list: Page 1 includes a checklist of coping tools. Try one strategy at a time for around two weeks.
- Test and compare: Different tools suit different people, and even different thoughts. Give each one a fair try.
- Tick what helps: Mark the strategies that reduce distress, or help you move on more quickly.
- Keep a simple record: On page 2, note the intrusive thought, what you tried, and what happened next. Over time, patterns become clearer.
Most importantly, this is about practise, not perfection. The goal is not to “win” against your mind, but to build a calmer relationship with your thoughts and reduce anxiety.
How to stop intrusive thoughts from running the show
Below are eight strategies I often teach in therapy. You can try them for yourself, or use them as part of supporting children with intrusive thoughts at home.
1) Thoughts are just thoughts
A thought isn’t a fact. It also isn’t a warning, a sign, or a prediction. It’s just a mental event.
When you remind yourself of that, you create a little space, then you can choose what to do next.
2) Notice it, then name it
Try a simple label, such as: “That’s an intrusive thought” or “My mind is throwing up a scary image.”
Labelling helps because it reduces the urge to argue with the thought.
3) Let it pass through
If you can, allow the intrusive thoughts or obsessions to be there without wrestling them. Many people like the “leaves on a stream” image, where each thought floats past and drifts away.
At first, this feels uncomfortable. Still, it gets easier with repetition.
4) Check if the thought is useful
Instead of asking, “Is it true?”, try asking, “Are these intrusive thoughts helpful right now?”
If the answer is no, the next step is to return to what you were doing, even if the feeling lingers.
5) Use mindfulness for intrusive thoughts
Mindfulness for intrusive thoughts is not about emptying your mind. It’s about paying attention to the present moment, without judging yourself.
Here’s a quick two-minute practice:
- Set a timer for 2 minutes.
- Focus on sound, near and far.
- Notice what you hear right now.
- When your mind drifts, gently bring it back to sound.
This creates a gap between the thought and your reaction. Over time, that gap gets bigger.
Mindful listening (a longer version)
- Sit somewhere comfortable.
- Play music or natural sounds, like rain or birds.
- Close your eyes and focus on the sounds.
- Notice changes in rhythm, pitch, and volume.
- When an intrusive thought appears, return to listening.
This can work well for adults and teens, and it’s also a gentle option for younger children.
6) Write the thought down
Writing can make intrusive thoughts feel less powerful. For some children, bubble writing and colouring it in helps too, because it turns the thought into something they can look at and feel a sense of control over, rather than something that ambushes them.
If writing feels too hard, start by writing a shorter version, like a headline.
7) Expect nonsense sometimes
Brains produce odd thoughts. That’s normal. Not every thought deserves your attention, and not every thought has meaning.
You don’t need to solve it.
8) Get into flow
Choose an activity that takes your full focus. Singing, sport, drawing, building, baking, or digital art can all help. Flow is when you are so absorbed in an enjoyable activity, you stop having distracting thoughts. The point is not distraction as a quick fix, it’s giving your mind a healthy rest.
Get Your Free Intrusive Thoughts Worksheet Here
Simply enter your email address here and I will send you the intrusive thoughts printable straight away.
How intrusive thoughts affect day-to-day life
Intrusive thoughts can change the way you see yourself and the world. Over time, they can feed unhelpful thinking habits associated with generalised anxiety disorder, such as assuming the worst, or guessing what other people think.
For example, a teen who has a thought like “Everyone thinks I’m stupid” might start treating it like a fact. Then they hold back in class, avoid activities, and lose confidence, potentially leading to depression. The result is a smaller life, even though the thought had no solid evidence behind it.
When you have the right coping tools, you can break that cycle. You still might get intrusive thoughts, but they take up less space.
Intrusive thoughts and mental health
Intrusive thoughts can show up on their own. They can also be part of a wider mental health picture, such as postpartum depression where hormonal shifts and the shock of such a momentous life change often trigger these thoughts in new parents. If you are concerned about your mental health or your child’s, speak to your doctor openly and discuss a referral to specialist services.
OCD (Obsessive-Compulsive Disorder)
In obsessive-compulsive disorder, intrusive thoughts often feel urgent and threatening. People may do compulsions (checking, repeating, seeking reassurance) to reduce anxiety. Sadly, that relief does not last, so the loop continues.
PTSD (Post-Traumatic Stress Disorder)
With post-traumatic stress disorder, intrusive thoughts may relate to trauma, including flashbacks and nightmares. This often needs specialist support from a trained mental health professional, which can include therapies such as EMDR (eye movement desensitization and reprocessing).
Anxiety disorders and panic
Many with an anxiety disorder experience intrusive thoughts. These thoughts can drive worry and fear, and sometimes contribute to panic attacks. When a person feels trapped by their mind, daily life can start to feel unsafe.
CBT and other therapies can help because they focus on changing your response to thoughts, rather than trying to remove every thought. Therapies like ACT (acceptance and commitment therapy) can also be powerful as they focus on accepting certain thoughts without judgment.
Worksheet example: Sonali, age 17
Sonali, aged 17, had obsessions in the form of intrusive thoughts about harm coming to her mum and younger sister. The thoughts felt frightening and in theory she knew everyone was safe, yet they kept showing up. As a result, she suffered from anxiety, becoming tense, watchful, and exhausted.
In cognitive behavioural therapy, we focused on the response rather than the content. Sonali learnt to spot the thought, label it as intrusive, and then test the urge to seek certainty or reassurance. We looked at evidence, practised more balanced thinking, and worked on allowing discomfort to rise and fall without trying to fix it immediately.
Over time, Sonali became more confident in saying, “This is a scary thought, not a real warning.” That helped her feel safer, even when the thoughts still appeared now and then.
Getting help for you or your child
If intrusive thoughts feel overwhelming, or your child is frightened and stuck, support can make a big difference.
CBT is one of the main therapies for intrusive thoughts. It helps you change the way you relate to the thought, so it has less power. Other approaches can also help, depending on the problem.
Other therapy approaches
Some people benefit from:
- Exposure Therapy, which reduces fear through gradual, supported steps at your own pace.
- Mindfulness-Based Cognitive Therapy, which blends CBT skills with mindfulness.
ERP (Exposure and Response Prevention)
ERP is often used for OCD. It helps a person face the trigger and resist compulsions, so the anxiety drops naturally over time.
Choosing the right professional
Look for a qualified mental health professional, such as a psychologist or psychiatrist, with experience in intrusive thoughts. Make sure they are registered with their professional body; in the case of a clinical psychologist in the UK (like me) that’s the HCPC – Health and Care Professions Council. A good therapist will take your situation seriously, and they will not judge you for what your mind produces.
Sometimes, a mental health professional might discuss medication alongside therapy, such as SSRIs or other antidepressants.
A plan that fits the person
A helpful treatment plan is individualised to the person’s age, history, specific needs, and goals. That is true for adults, and it is especially true for children and teenagers.
Summary
Intrusive thoughts are common, and they can feel frightening, especially when they show up as vivid images. Still, images and thoughts are not facts, and they don’t define you or your child.
When you understand what intrusive thoughts are, and you practise skills like labelling, letting thoughts pass, and mindfulness for intrusive thoughts, you can reduce the impact, particularly when these intrusive thoughts trigger anxiety or stress.
My worksheet gives you a simple way to track what helps manage these unwanted intrusive thoughts, so you can build a personal toolkit that works in real life.
Dr Lucy Russell is a UK clinical psychologist and Clinical Director of Everlief Child Psychology. She qualified as a clinical psychologist from Oxford University in 2005 and worked in the National Health Service for many years before moving fully into her leadership and writing roles.
In 2019 Lucy launched They Are The Future, a support website for parents of school-aged children. Through TATF Lucy is passionate about giving practical, manageable strategies to parents and children who may otherwise struggle to find the support they need.
Lucy lives with her family, rescue cats and dog, and also fosters cats through a local animal welfare charity. She loves singing in a vocal harmony group and spending time in nature.
