02/18/2026
Many people experience intrusive thoughts, and it doesn’t necessarily mean something is wrong. They may happen when a person is going through a lot of stress, or they may just happen randomly.
Just aving an intrusive thought every once in a while isn’t a sign of mental illness. They can be totally normal, like the brain version of a hiccup. A child with occasional intrusive thoughts can usually brush them off without taking them too seriously.
But children who are struggling with repeated, ongoing intrusive thoughts can’t brush them off so easily. In these cases, a child may be dealing with a mental health problem that needs attention. OCD and PTSD are two common mental health conditions that can cause children to have intrusive thoughts.
Kids with OCD deal with repeated thoughts, worries, or mental pictures that upset or scare them. Kids are bothered by these worries, and feel pushed to do something to make the worry go away or prevent something bad from happening. This creates a cycle of repeated worries and repeated behaviors, called obsessions and compulsions, that take up a lot of time and add even more stress.
Children who have survived extremely frightening or dangerous events may have lingering problems after the fact. While some kids will bounce back, others may be diagnosed with PTSD. Kids with PTSD will re-experience parts of their trauma in some way, often through intrusive thoughts or flashbacks. Flashbacks are vivid memories that pop up suddenly and intensely, almost as if a child is living through the event again.