Tinnitus Causes

 

Tinnitus causes: among the more common things that cause tinnitus are exposing ones ears to loud sounds, ototoxic prescription drugs, eating certain foods, hearing loss, allergies, stress, cholesteatoma, ear infections, sinus infections, acoustic neuroma,and high blood pressure, to name a few of the possible causes for tinnitus.Among the previous lists of causes for tinnitus, the most common cause, is exposure to loud noise which damages the sensory hair cells of the inner ear.

 

 

Tinnitus Causes

Most people with tinnitus have some degree of hearing loss, in that they are often unable to hear clearly external sounds that occur within the same range of frequencies as their "phantom sounds".It is estimated that 90% of people with tinnitus, have some degree of hearing loss. Meniere disease (idiopathic endolymphatic hydrops) is an inner ear disorder with symptoms that include vertigo, tinnitus, hearing loss, and the sensation of ear fullness.  Idiopathic unilateral sudden sensorineural hearing loss, defined as hearing loss of 30 dB within a three-day period, is an urgent situation.  Associated symptoms include tinnitus, vertigo, and aural fullness. 

 

Characteristically, patients presenting with glomus tumors are women 40 to 50 years of age who report pulsatile tinnitus and hearing loss.  Patients report unilateral fluctuating hearing loss with aural fullness, tinnitus, and episodic vertigo. The main difference between tinnitus and hearing loss is the extent of the damage (as tinnitus can still be heard).  Tinnitus can also be caused by natural hearing impairment (as in aging), as a side effect of some medications, and as a side effect of genetic (congenital) hearing loss.  You should also receive a full hearing evaluation by an audiologist to see if hearing loss may be causing your tinnitus. If the hearing loss is conductive, the sound will be heard best in the affected ear. 

Tinnitus Causes

Tinnitus causes may be as a result of ,complete occlusion of the ear canal by cerumen which is a  frequent cause of conductive hearing loss.  Foreign bodies in the external auditory canal also can cause unilateral conductive hearing loss. Exostoses and osteomas are benign bony growths of the external auditory canal that interfere with normal cerumen migration, leading to occlusion and conductive hearing loss. Otitis media is the most common cause of conductive hearing loss in children.  Middle ear effusions decrease the mobility of the tympanic membrane and the ossicular chain.  It is the leading cause of conductive hearing loss in adults who do not have a middle ear effusion or a history of otitis media

 

The ear is divided anatomically into three sections (external, middle, and inner), and pathology contributing to hearing loss may strike one or more sections.  Perforations of the tympanic membrane cause hearing loss by reducing the surface area available for sound transmission to the ossicular chain Leading causes of conductive hearing loss include cerumen impaction, otitis media, and otosclerosis. In the presence of conductive hearing loss, bone conduction is better than air conduction, and the sound is not heard when the tuning fork is placed adjacent to the canal.  Conductive hearing loss caused by ossicular erosion is present in 90 percent of patients with cholesteatomas.  Longstanding cholesteatomas expand to involve the mastoid, inner ear, and facial nerve.  Congenital cholesteatoma presents as a pearly white mass located behind an intact tympanic membrane in a patient with unilateral conductive hearing loss

Tinnitus Causes

Patients with acoustic neuromas present with unilateral sensorineural hearing loss approximately 10 to 22 percent of the time  Patients with asymmetric sensorineural hearing loss require evaluation for a retrocochlear tumor.  Patients present with rapidly progressive bilateral sensorineural hearing loss and poor speech discrimination scores, and they also may have vertigo or disequilibrium.  Sensorineural hearing loss encompasses disorders that affect the inner ear and the neural pathways to the auditory cortex. 

 

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Sensorineural hearing loss occurs when there is a problem within the cochlea or the neural pathway to the auditory cortex. A common and often misdiagnosed condition that mimics tinnitus is Radio Frequency (RF) Hearing, in which subjects have been tested and found to hear high-pitched transmission frequencies that sound similar to tinnitus. Since there is normally no external sound corresponding to the sounds you are "hearing," tinnitus is truly a phantom sound.  It is further hypothesized somatic tinnitus may be due to "central crosstalk" within the brain, as certain head and neck nerves enter the brain near regions known to be involved in hearing.  Advancing age is generally accompanied by a certain amount of hearing nerve impairment, and consequently chronic tinnitus.  Therefore, hearing tests are essential before a proper diagnosis of tinnitus may be determined, and to treat tinnitus causes.

 

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