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The cause is often not clear. It may be due to a virus, but it can also arise from bacterial infection, head injury, extreme stress, an allergy, or as a reaction to medication. 30% of affected people had a common cold prior to developing the disease. [1] Either bacterial or viral labyrinthitis can cause a permanent hearing loss in rare cases. [7]
A perforated eardrum can have one of many causes, such as: Infection (otitis media). [3] This infection may then spread through the middle ear and may reoccur. [3] Trauma. This may be caused by trying to clean ear wax with sharp instruments. It may also occur due to surgical complications. [4]
The link between NSAIDs and hearing loss tends to be greater in women, especially those who take ibuprofen six or more times a week. [36] Others may cause permanent hearing loss. [37] The most important group is the aminoglycosides (main member gentamicin) and platinum based chemotherapeutics such as cisplatin and carboplatin. [38] [39]
Hearing loss usually fluctuates in the beginning stages and becomes more permanent in later stages. Ménière's disease has a course of 5–15 years, and people generally end up with mild disequilibrium, tinnitus, and moderate hearing loss in one ear. [5]
Some over-the-counter as well as prescription drugs and certain industrial chemicals are ototoxic. Exposure to these can result in temporary or permanent hearing loss. Some medications cause irreversible damage to the ear, and are limited in their use for this reason. The most important group is the aminoglycosides (main member gentamicin). A ...
A common condition that results in hearing loss is chronic ear infections. [2] Certain infections during pregnancy, such as cytomegalovirus, syphilis and rubella, may also cause hearing loss in the child. [2] [10] Hearing loss is diagnosed when hearing testing finds that a person is unable to hear 25 decibels in at least one ear. [2]
Rarely, Mycobacterium species can also cause the infection. Some mastoiditis is caused by cholesteatoma, which is a sac of keratinizing squamous epithelium in the middle ear that usually results from repeated middle-ear infections. If left untreated, the cholesteatoma can erode into the mastoid process, producing mastoiditis, as well as other ...
Hearing loss globally due to ear infection is estimated to be 30 people in every 10,000. [36] Around the world there is around 21,000 to 28,000 deaths due to complications from ear infections. [36] These complications include brain abscesses and meningitis.