It is tensor tympani muscle fasciculations, But, whenever one is having abnormal sounds, it is safest to have it checked out. It could be as simple as taking an NSAID, which can cause auditory hallucinations (I had them!), to an auditory tumor, or malignant brain tumor. Most likely it is nothing. But, are you wiling to take a gamble with your health, if it happens to you?! I am not an ENT but I am a general surgeon and an anatomist who taught gross anatomy lab in the medical school I later attended.
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