ADAA member Paul Greene, PhD authors this YourTango.com blog post about how to manage intrusive thoughts: "

If you've ever had a random thought pop into your head that left you shaken or questioning yourself, you may have experienced an "intrusive thought."

Learning how to stop intrusive thoughts is important, since many times, these thoughts can be disturbing, bleak, or upsetting, and leave you wondering what's really going on in your head..."