Ear discharge, also known as otorrhea, refers to the drainage of fluid from the ear. This discharge can vary in color, consistency, and odor, and it may be accompanied by other symptoms such as pain, hearing loss, or ringing in the ears. There are several potential causes of ear discharge, and it's important to identify the underlying issue for appropriate treatment. Here are some common causes:

1. Otitis Media: This is an infection of the middle ear. It can cause pain, fever, and a discharge from the ear.
2. External Otitis (Swimmer's Ear): Inflammation or infection of the ear canal, often caused by water exposure. It may result in discharge, itching, and pain.
3. Trauma or Injury: An injury to the ear canal or eardrum can lead to discharge.
4. Earwax Buildup: Excessive earwax can cause a blockage and lead to infection and discharge.
5. Foreign Object: Inserting objects into the ear can cause irritation, infection, and discharge.
6. Cholesteatoma: A noncancerous growth of skin-like tissue in the middle ear that can lead to infection and discharge.
7. Mastoiditis: Infection of the mastoid bone behind the ear, often associated with ear infections.
8. Tympanostomy Tube Otorrhea: Discharge from the ear due to complications with ear tubes.

If you or someone you know is experiencing ear discharge, it's crucial to seek medical attention. A healthcare professional can examine the ear, identify the underlying cause, and recommend appropriate treatment, which may include antibiotics, ear drops, or other interventions depending on the specific condition. Self-diagnosis and treatment can lead to complications, so it's essential to consult with a healthcare provider for proper care.