It can be considered as OCD if it is bad. I’m not an expert. I just recall it being part of the PDR
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4723199/#:~:text=Obsessive%2Dcompulsive%20disorder,-Patients%20with%20OCD&text=Earworms%20are%20considered%20intrusions%3A%20unwelcome,%2C%20dirt%2C%20and%20contamination).
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