Tag: Periorbital ecchymosis

While most black eyes result from direct trauma, a significant number of cases occur without any obvious impact. Understanding what causes a black eye without injury can reveal underlying health issues that range from common allergies to serious systemic diseases.

Bruising around the eyes, colloquially known as 'panda eyes' or 'raccoon eyes,' is medically termed periorbital ecchymosis, and it can be a sign of a significant underlying condition. While often associated with simple trauma, this distinctive bruising pattern can also indicate a more serious injury, such as a skull fracture, requiring immediate medical attention.

Over 50% of patients with a basilar skull fracture present with the hallmark 'raccoon eye' sign, which is bilateral periorbital ecchymosis. A **raccoon eye diagnosis** is a critical clinical finding signaling potential underlying trauma or systemic illness that requires immediate and thorough medical evaluation.

While a visible bruise often indicates physical trauma, approximately 10% of patients with primary light chain amyloidosis, a systemic disease, initially present with periorbital purpura. This makes the question, "Why do I suddenly have an unexplained bruise under my eye?", a valid concern with a range of possible answers, from benign to more serious underlying health issues.