Earache is also known as Otalgia in Medical term

There are 2 types of Earache or Otalgia:

1st is Primary Earache or Otalgia: in this the cause of Earache lies within the Ear, we will list the causes shortly

2nd is Secondary Earache or Otalgia: in this the cause of Earache is somewhere else other than ear but because of shared nerve supply with the affected area, it seems to the patient as if ear is also experiencing Earache

First We will enlist the Major causes of Primary Earache, we will discuss these diseases in detail later on for now we will only list them:

We first divide the ear into 5 Major Parts:
Pinna, External Auditory Canal, Middle Ear, Mastoid and Inner Ear

In Pinna the causes of Earache can include:
Laceration or bite
Hematoma
Otitis Externa
Perichondritis
Pre-Auricular Sinus
Frostbite/Sunburn

In External Auditory Canal the causes can include:
Impacted Wax
Foreign Body
Furuncle
Otitis Externa
Keratosis Obturans

In Middle Ear the Causes can include:
Acute otitis Media
Secretory otitis Media
Traumatic Perforation
Hemotympanum
Barotrauma

In Mastoid the causes can include:
Mastoiditis
Abscess
Granulomas

In Inner Ear the causes can include:
Acoustic Trauma
Meniere’s disease

For Referred Pain or Secondary Earache the Major Nerves are:

5th or Trigeminal Nerve: it carries pain to ear from Teeth, Oral Cavity and Tempor-mandibular Joint

7th or Facial Nerve: it carries pain to ear from Herpes Zoster infection and vestibular schwanomma

9th or Glossopharyngeal Nerve: it carries pain from Tonsil area as well as oropharynx area
10th or Vagus Nerve: it carries pain to ear from Hypopharynx and larynx area

2nd or 3rd Cranial Nerves: these carry pain to ear from Cervical Spine Degeneration diseases as well as whiplash/trauma to spine

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