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Bipolar disorder and musical obsessions.

Although not listed in the DSM-5, musical obsessions (also known as stuck song syndrome) are generally considered a symptom of obsessive-compulsive disorder. Occurring alone or concurrently with other symptoms of obsessive-compulsive disorder, musical obsessions may be common in bipolar disorder. Due to the lack of awareness and availability of proper screening measures, under-diagnosis of musical obsessions may also be common in the context of bipolar disorder.