What might cause a toddler to have two inch in diameter soft fluid filled area above the left ear if they no other symptoms?

There are a few possible causes for a toddler to have a two inch in diameter soft fluid filled area above the left ear.

- Insect bite or sting: An insect bite or sting can cause a localized reaction in the skin, which can lead to swelling and fluid buildup.

- Allergic reaction: An allergic reaction to food, medication, or another substance can cause swelling and fluid buildup in the body, including the area around the ear.

- Infection: A bacterial or viral infection can cause inflammation and fluid buildup in the body, including the area around the ear.

- Trauma: Trauma to the head or ear can cause bleeding and fluid buildup in the area.

- Rare conditions: In rare cases, a soft fluid filled area above the ear can be a sign of a more serious medical condition, such as a tumor or cyst.

If you are concerned about a soft fluid filled area above your toddler's ear, it is important to seek medical attention right away. The doctor can determine the cause of the swelling and recommend the appropriate treatment.