It’s common to have an intrusive thought every once in a while. In fact, it happens to almost everyone.

Although intrusive thoughts are usually nothing to worry about, sometimes they can start to interfere with your daily life.

People who feel fear or guilt about their intrusive thoughts, or feel like they need to take action to control the thoughts, may be experiencing something more serious. If that’s the case, it’s a good idea to talk with a doctor.

Intrusive thoughts may not have a cause. They can just happen randomly. Some thoughts wander into your brain. Then just as quickly, they exit, leaving no lasting impression.

Less commonly, intrusive thoughts are related to an underlying mental health condition, like obsessive-compulsive disorder (OCD) or post-traumatic stress disorder (PTSD). These thoughts could also be a symptom of another health issue, such as:

• brain injury
• dementia
• Parkinson’s disease

Signs that there might be an underlying cause include intrusive thoughts that:

• last longer than a brief moment
• continue to pop back into your head
• cause distress over time
• make you feel like you need to control your thoughts.

• Cognitive behavioral therapy (CBT): you’ll work with a therapist to learn ways of thinking that can help you become less sensitive to intrusive thoughts. In a controlled setting, your therapist may also expose you to triggers for your intrusive thoughts so you can learn to react to them differently.
• Medication. Sometimes, medications are used to treat conditions like OCD and PTSD.
• Self-care. A good step toward treating intrusive thoughts is recognizing what they are: just thoughts. You can learn to label them when they happen and recognize that thoughts are not the same as intent or behavior.