This is more commonly known as Swimmer's Ear. Ruptured Eardrum Hematoma Auris Conjunctivitis Otitis Externa

## Step 1
The problem is asking us to identify the common name for a medical condition known as Swimmer's Ear. Swimmer's Ear is a term used to describe an infection in the outer ear canal, which is the tube that runs from your eardrum to the outside of your head. This condition is also known as Otitis Externa.

## Step 2
Let's go through the options one by one:

1. Ruptured Eardrum: This is a condition where the eardrum, or tympanic membrane, has been damaged. This is not the same as Swimmer's Ear, which is an infection.

2. Hematoma Auris: This is a condition where there is a collection of blood in the ear. This is not the same as Swimmer's Ear, which is an infection.

3. Conjunctivitis: This is an inflammation or infection of the outer membrane of the eyeball and the inner eyelid. This is not the same as Swimmer's Ear, which is an infection in the ear.

4. Otitis Externa: This is the medical term for Swimmer's Ear, which is an infection in the outer ear canal.