Can a tooth abscess cause a black and blue on the outside of the effected area?

Dental Abscess !!: Good day; Neglected dental abscesses can cause a person to become l've seen general surgeons open and close extra-oral openings on a patient's check only for the fistula to return. Directly related to an affected tooth. A patient's eye closed due to an infected nerve from an upper front tooth. Suggest an immediate visit to the dentist.

Dental abscess: Dental abscess is a virulent dangerous quickly spreading infection. Infection can damage surrounding bone and gum tissues, drain through the skin to the outside (will leave a scar), and quickly spread to other organs in your body via the circulatory system. What you are describing is an emergency requiring immediate treatment by a Dentist (not an ER unless they have a Dental Department)