The thoughts are intrusive and persistent. This not a normal occurrence unless you are not bothered by them and they are part of a thinking process that is productive and goal oriented. If intrusive thoughts
are the only symptom, without an obvious or overt compulsion, you can consider the possibility of Pure-O, which is not an uncommon condition. For a diagnosis, you will have to get a thorough evaluation done by a mental health professional.
Abhijeet Deshmukh, MD