BACKGROUND: Bloody tears are a rare symptom that can be caused by local or systemic pathology. METHODS: We describe a very rare case of bloody tears that resulted from hyperthyroidism. RESULTS: A 15-year-old female patient presented with a 6-month history of bloody tears and epistaxis. Examination excluded local ocular and nasal pathology, including neoplasm and coagulopathy. Systemic investigations identified elevated thyroid function and following treatment her symptoms resolved. We discuss the mechanism by which hyperthyroidism may induce haemostatic dysfunction. CONCLUSION: We present the first case of bloody tears secondary to thyroid dysfunction.
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