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What causes a black eye?
The most common cause of a black eye is a blow to the eye, nose, or forehead. Depending on where the blow lands, one or both eyes may be affected.
A blow to the nose often causes both eyes to swell because the swelling from the nasal injury causes fluid to collect in the loose tissues of the eyelids.
Other causes of black eye include:
- surgical procedures to the face, such as a facelift, jaw surgery, or nose surgery;
- a certain type of head injury, called a basilar skull fracture, causes both eyes to swell and blacken; this condition is typically described as "raccoon eyes."
Other causes of swelling around the eye include (these conditions do not necessarily make the skin turn black and blue around the eye):
- allergic reactions,
- cellulitis (skin infection around the eye),
- angioedema (swelling, usually around both eyes), and
- dental infections.