Intrusive Thoughts: Understanding, Managing, and Overcoming Unwanted Thoughts

What are intrusive thoughts?

Intrusive thoughts are unwelcome, often distressing thoughts, images, or urges that can suddenly enter one’s mind without apparent cause. These thoughts can be jarring and vary widely in content—from fears about safety to inappropriate or taboo subjects.

Are intrusive thoughts normal?

Absolutely. Nearly everyone experiences intrusive thoughts at some point. However, the frequency and intensity of these thoughts can be much higher in people suffering from mental health conditions. It’s important to understand that having intrusive thoughts does not make you a bad person; they do not reflect your true character or desires.

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Intrusive thoughts versus obsessions

While intrusive thoughts are common and typically fleeting, they differ significantly from obsessions, which are characteristic of Obsessive-Compulsive Disorder (OCD). Obsessions are persistent and distressing thoughts that often lead to repetitive behaviours, known as compulsions, aimed at reducing anxiety. If you find that your intrusive thoughts are not just fleeting but are causing significant distress and leading to compulsive behaviours, it’s crucial to seek professional help.

Simple explanation of intrusive thoughts.

Imagine intrusive thoughts as uninvited guests who show up at your house. They are loud, demanding, and disrupt the harmony of your home. How you interact with these guests—whether you argue with them, ignore them, or engage with them—affects how long they stay and how much disturbance they cause.

Understanding and Interpretation

Intrusive thoughts gain significance not merely by their presence but how we interpret them. For instance, if you think about jumping in front of a train, such a thought might shock you momentarily. However, if you dismiss it as just a random brain misfire, it passes without much consequence. On the other hand, if you dwell on why you had the thought, it might start to seem more significant and troubling.

Types of Intrusive Thoughts

  • Aggressive or Violent: Thoughts of harming oneself or others.
  • Sexual: Unwanted sexual thoughts, which may involve inappropriate or forbidden subjects.
  • Religious or Blasphemous: Thoughts that confront or violate religious beliefs.
  • Symmetrical/Order: An overwhelming need to arrange objects in a precise manner.
  • Contamination: Fears about germs, dirt, or getting poisoned.
  • Existential: Deep, philosophical thoughts about life and death that are disturbing.

Examples to Illustrate Intrusive Thoughts

  • A new parent might envision harm coming to their newborn, not out of desire but as a vivid fear of the worst scenario.
  • During a church service, someone might have a blasphemous thought that is completely at odds with their personal beliefs.
  • While driving, a person might suddenly think about swerving into traffic—an alarming thought that quickly recedes when recognized as just an intrusive thought.
  • Harm/Violence:
    • While walking down a crowded street, you have a sudden, disturbing image of yourself shoving a stranger into oncoming traffic. This is a frightening thought, but you immediately recognize it as intrusive and unrelated to your actual feelings or intentions.
  • Contamination/Fear of Germs:
    • You’re enjoying a delicious meal at a restaurant, but a persistent thought keeps nagging at you. You imagine microscopic germs crawling all over your plate, even though you saw the staff thoroughly cleaning the tables. This unwanted thought disrupts your ability to relax and enjoy your food.
  • Sexual:
    • You’re spending time with a close friend of the opposite sex. Suddenly, a fleeting image of a sexual nature pops into your head, even though you’re not attracted to them in that way. This unexpected thought can be confusing and embarrassing, but it’s important to remember it doesn’t reflect your true feelings about your friend.
  • Relationship:
    • You’re in a happy and secure relationship. However, during a minor disagreement with your partner, a wave of intrusive worry washes over you. You start questioning their love and commitment, even though there’s no evidence to support these doubts.
  • Existential:
    • Gazing up at a starry night sky, you’re struck by the vastness of the universe. This can trigger overwhelming thoughts about the meaning of life, your place in the grand scheme of things, and what happens after death. While these are natural questions, intrusive thoughts can turn them into a source of anxiety.
  • Superstitious:
    • You’re about to give a presentation at work, a very important event for your career. As you walk into the conference room, you step on a crack in the floor. A superstitious thought pops into your head, making you worry that this is a bad omen and your presentation will be a disaster.

Thinking about thinking

Metacognition, or thinking about thinking, plays a critical role in how intrusive thoughts affect us. People who can acknowledge these thoughts as merely random brain activity tend to move past them more easily than those who interpret them as meaningful or reflective of their desires.

When to Seek Professional Help

You should consider professional advice if intrusive thoughts are causing significant distress, impacting your ability to function, or leading to compulsive behaviours. Mental health professionals can provide diagnoses and structured treatment approaches like Cognitive Behavioral Therapy (CBT) and Exposure Response Prevention (ERP).

Treatment and Management

Treatment and Management:

Intrusive thoughts can be effectively managed through various therapeutic approaches. One common method is Cognitive Behavioral Therapy (CBT), which helps identify and challenge distorted thinking patterns that contribute to anxiety. Exposure and Response Prevention (ERP) is another effective technique that gradually exposes individuals to their triggers while preventing them from engaging in compulsive behaviours.

A Case of Successful Treatment:

Consider the case of Elena, a woman who experienced significant distress due to intrusive thoughts. Therapy using CBT and ERP helped her develop coping mechanisms to manage her anxiety and reduce the frequency and intensity of these thoughts. This example demonstrates the positive impact that professional intervention can have on managing intrusive thoughts.

“Elena,” is a 34-year-old female who came to my practice with complaints of persistent, distressing intrusive thoughts that were significantly impacting her daily functioning. Elena described her thoughts as primarily aggressive and violent, often involving images of harming her loved ones or causing public disturbances. These thoughts caused her great distress and shame, as they were entirely inconsistent with her values and character.

Presenting Problem:
Elena reported that these thoughts had been present for several years but had intensified over the past six months, likely triggered by increased stress at work and a recent family bereavement. She found herself engaging in compulsive behaviours, such as repeatedly checking on her family members to ensure they were safe and asking for reassurance from her partner about her character. These behaviours, while temporarily relieving her anxiety, were time-consuming and negatively affected her relationships and professional life.

Assessment and Diagnosis:
During the initial sessions, I conducted a thorough assessment using structured interviews and psychological scales, which confirmed the diagnosis of Obsessive-Compulsive Disorder (OCD) characterized by aggressive intrusive thoughts and compulsive checking behaviors. The assessment helped Elena understand that her experiences were symptoms of a well-known disorder, which alone significantly reduced her self-blame.

Treatment Plan:
We agreed on a treatment plan that included Cognitive Behavioral Therapy (CBT) with a specific focus on Exposure and Response Prevention (ERP), which is considered the gold standard for treating OCD.

Implementation of Treatment:

  1. Cognitive Behavioral Therapy:
    Through CBT, Elena learned to identify and challenge the distorted beliefs that fueled her intrusive thoughts and anxiety. We worked on cognitive restructuring techniques to help her develop more balanced and less catastrophic ways of interpreting her thoughts.
  2. Exposure and Response Prevention:
    In ERP sessions, Elena was gradually and systematically exposed to the situations and thoughts that triggered her anxiety but was encouraged not to engage in her usual compulsive behaviours. For example, she was asked to write down her intrusive thoughts or to carry a kitchen knife while cooking without allowing herself to check if everyone was safe afterward.
  3. Mindfulness and Acceptance Techniques:
    To help Elena manage the anxiety associated with exposure exercises and to decrease her engagement with the intrusive thoughts, we incorporated mindfulness exercises. She learned to observe her thoughts non-judgmentally and to accept their presence in her mind without reacting to them with fear or compulsive behaviours.

Outcome of the Treatment:

Over several months of therapy, Elena reported a significant reduction in the frequency and intensity of her intrusive thoughts. She learned effective coping strategies that enabled her to manage her anxiety without resorting to compulsive checking. Her relationships and work performance improved as she regained confidence in her ability to control her reactions to her thoughts.

Elena continues to practice the skills she learned in therapy and attends monthly follow-up sessions to reinforce these skills and address any new challenges.

Lifestyle Adjustments

Prioritizing sleep, exercise, and healthy eating can improve overall mental resilience and reduce the frequency of intrusive thoughts. Also, engaging in relaxation techniques like yoga or meditation can help maintain your mental equilibrium.

Diversity and Inclusivity in Intrusive Thoughts

It’s crucial to recognize that the nature and impact of intrusive thoughts can vary widely across different cultures, ages, and backgrounds. Understanding this can help in creating more personalized and effective treatment plans.

Intrusive thoughts can be disruptive, but remember, you’re not alone. If these thoughts are causing you significant distress, reach out to a therapist or mental health professional. There is help available, and with the right approach, you can effectively manage intrusive thoughts and live a fulfilling life. You can also find resources and support groups online or through mental health hotlines.


Intrusive thoughts are a common human experience. Recognizing them for what they are—simply thoughts—is the first step towards managing their impact on your life. With the right strategies and support, it is possible to control these thoughts and prevent them from

All content on MoodSmith is written and researched by Dr Elaine Ryan and uses only peer-reviewed research on journals, government bodies, universities and professional bodies to support the article. 

Cambridge Dictionary
Radomsky, Adam & Alcolado, Gillian & Abramowitz, Jonathan & Alonso, Pino & Belloch, Amparo & Bouvard, Martine & Clark, David & Coles, Meredith & Doron, Guy & Fernández-Alvarez, Héctor & Garcia-Soriano, Gemma & Ghisi, Marta & Gómez, Beatriz & Inozu, Mujgan & Moulding, Richard & Shams, Giti & Sica, Claudio & Simos, Gregoris & Wong, Wing. (2013). Part 1—You can run but you can’t hide: Intrusive thoughts on six continents. Journal of Obsessive-Compulsive and Related Disorders. 3. 10.1016/j.jocrd.2013.09.002.

Clark, D. A. (2005). Intrusive thoughts in clinical disorders: Theory, research, and treatment. Guilford Press.
Abramowitz JS, Deacon BJ, Olatunji BO, Wheaton MG, Berman NC, Losardo D, Timpano KR, McGrath PB, Riemann BC, Adams T, Björgvinsson T, Storch EA, Hale LR. Assessment of obsessive-compulsive symptom dimensions: development and evaluation of the Dimensional Obsessive-Compulsive Scale. Psychol Assess. 2010 Mar;22(1):180-98. 10.1037/a0018260. PMID: 20230164.
Glazier, Kimberly & Wetterneck, Chad & Singh, Sonia & Williams, Monnica. (2015). Stigma and Shame as Barriers to Treatment in Obsessive-Compulsive and Related Disorders. Journal of Depression and Anxiety. 4. 191. 10.4191/2167-1044.1000191.
Cathey, A. J., & Wetterneck, C. T. (2013). Stigma and disclosure of intrusive thoughts about sexual themes. Journal of Obsessive-Compulsive and Related Disorders, 2(4), 439–443.
International Statistical Classification of Diseases and Related Health Problems (11th ed,; ICD-11; World Health Organization, 2019).
Diagnostic and Statistical Manual of Mental Disorders (5th ed.; DSM-5; American Psychiatric Association, 2013).
Rachman S. A cognitive theory of obsessions. Behav Res Ther. 1997 Sep;35(9):793-802. doi: 10.1016/s0005-7967(97)00040-5. PMID: 9299799.
McKay D, Sookman D, Neziroglu F, Wilhelm S, Stein DJ, Kyrios M, Matthews K, Veale D. Efficacy of cognitive-behavioral therapy for obsessive-compulsive disorder. Psychiatry Res. 2015 Feb 28;225(3):236-46. doi: 10.1016/j.psychres.2014.11.058. Epub 2014 Dec 8. PMID: 25613661.
Abramowitz, J. S. (1996). Variants of exposure and response prevention in the treatment of obsessive-compulsive disorder: A meta-analysis. Behavior Therapy, 27(4), 583–600.

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