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Any neck pain
, ear pain. Do you experience bad smell from mouth or halitosis
. Any difficulty in swallowing and metallic taste
. Are you hearing this sound in one or both ears. Kindly be more specific. You could be having fluid collection in your throat which may be a cause of this sound. Avoid spicy food. Eat healthy. Since you are only 28 it is rare to have a diverticulum, but I recommend you consult an ENT/General Surgeon
and get a thorough checkup in this regard. Drink plenty of water.