The taste of blood in the mouth when there is no visible blood is commonly caused by several factors, including:
- Poor oral hygiene or gum inflammation (gingivitis), which can cause gums to bleed slightly and leave a blood taste.
- Use of iron or mineral-based supplements and certain medications that can produce a metallic or blood-like taste.
- Nosebleeds that drip blood into the mouth, even if unnoticed.
- Sinus infections or sinusitis causing mucus build-up and a metallic taste.
- Mild trauma in the mouth or irritation that causes minor bleeding not visibly noticeable.
- Exercise-induced breakdown of red blood cells releasing iron, sometimes experienced after heavy breathing during workouts.
- Some infections, allergies, or neurological conditions can alter taste perception and cause a blood or metallic sensation.
If the blood taste persists or is accompanied by other symptoms like pain, swelling, or visible bleeding, it is advisable to see a doctor or dentist for a thorough assessment and appropriate treatment. Good oral hygiene and checking possible medication side effects are also important steps to take.
