Could be an insect bite.
Could be an allergy, try an OTC antihistamine.
You do
The hair on one's head grows from the scalp. The scalp has definite edges that do not reach the ears, just as they do not reach the eyebrows.
If you are really good at wiggling your ears, you can probably do it.......
An old wives' tale about ears itching is often associated with someone talking about you behind your back. However, there is no scientific evidence to support this belief. Ears can itch for various reasons, such as dry skin, allergies, or irritation.
Creation in the 21st Century - 2004 No Time for Itching Ears 1-13 was released on: USA: 2 April 2014
A full piece that covers the entire scalp is generally called a "wig". A partial piece, typically for males, that covers the top of the scalp but exposes the natural scalp around the ears and back is called a "toupee".
usually lice are found behind your ears and the eggs are usually found near the scalp.
See the image above for raccoon ears.
Since the scalp covers the cranium and since the bottom edge of the cranium includes behind the ears, I think the post auricular area is part of the scalp. Kate Kurfess, CPC, CCS-P
Rosacea is a chronic skin condition that causes redness and swelling of the face that can also occur on the scalp, neck, ears, chest, and back. It has been argued that facial rosacea is a cutaneous vascular disorder; however, researchers have not found any evidence that a vascular dysfunction causes rosacea.
The adult form may be visible on the patient's scalp, especially around the ears; or its grayish-white nits (eggs) may be visible at the base of the hairs close to the scalp.