Blood Tears: Separating Fact from Fiction - A Scientific Explanation

Haemolacria (bloody tears) is a real but extremely rare clinical phenomenon, not a myth. It is not "crying blood" in the supernatural sense, but a sign of underlying pathology.

Documented Causes

• Ocular: Conjunctival/lacrimal gland tumors, trauma, inflammation (severe conjunctivitis), vascular malformations.
• Systemic: Coagulopathy (hemophilia, anticoagulants), hypertension, vicarious menstruation (endometriosis of lacrimal tissue), hormonal fluctuations.
• Idiopathic: No identifiable cause; self-limited.

Mechanism

Blood enters tear film via conjunctival vessels or reflux from nasolacrimal duct (epistaxis, nasal tumors). Tears appear pink to frank red.

Evaluation

• Ophthalmic exam (slit lamp, dilated fundus).
• Nasal endoscopy.
• Coagulation panel, CBC, BP.
• Imaging (MRI orbits/sinuses) if mass suspected.

Key Takeaway

While anecdotal reports exist, haemolacria warrants medical investigation — it is a symptom, not a diagnosis.