Tinnitus: This condition is characterized by a ringing, buzzing, or pounding sensation in the ears when no external sound is present. It's often associated with exposure to loud noise, age-related hearing loss, or certain medications.

Hypertension: High blood pressure can cause blood vessels in the ears to become more pronounced, leading to a pounding sensation.
Anxiety or Stress: Increased heart rate and blood flow associated with anxiety or stress can cause a pounding sensation in the ears.
Earwax Buildup or Blockage: Excessive earwax can cause a sensation of fullness or pounding in the ears.
Middle Ear Infection: Infections in the middle ear can cause pain, fullness, and a pounding sensation due to fluid buildup or Eustachian tube dysfunction.

Carotid Artery Stenosis: Narrowing of the carotid arteries can lead to a pounding or whooshing sound in the ears due to turbulent blood flow, which is a significant risk factor for stroke.
Aortic Stenosis: This heart condition, characterized by the narrowing of the aortic valve, can cause a pounding sensation in the ears due to altered blood flow dynamics.
Glomus Tumor: A rare tumor of the middle ear that can cause pulsatile tinnitus (a pounding sensation in sync with the heartbeat).
Temporal Arteritis: Inflammation of the blood vessels in the head, which can lead to a pounding headache and tinnitus, among other symptoms.

Otosclerosis: A condition that affects the middle ear, causing hearing loss and potentially a pounding sensation due to abnormal bone growth.
Meniere's Disease: A disorder of the inner ear that can cause episodes of vertigo, tinnitus, hearing loss, and a feeling of fullness or pressure in the ear.
Superior Semicircular Canal Dehiscence: A rare condition where a portion of the inner ear is exposed to the brain, leading to a variety of auditory and balance symptoms, including pulsatile tinnitus.