What Causes a Bloody Taste in Your Mouth?

Some causes of a bloody metallic taste in the mouth are side effects of medication or chemotherapy, sinus issues and central nervous system disorders, according to Healthline. Pregnancy, food allergies and middle ear surgery are other possible causes of a metallic taste in the mouth, as is poor mouth hygiene.

Some specific medications that cause a metallic bloody taste are antibiotics, such as Biaxin and Flagyl; blood pressure medications, such as Capoten; and glaucoma medications, such as Neptazane, notes Healthline. Central nervous disorders, such as Bell's palsy or a stroke, cause messages in the brain to distort, which results in a metallic or bloody taste.