10 Common Causes of Metallic Taste in the Mouth

5. Intense Exercise

Noticing a metallic or bloody taste during strenuous workouts is quite common. Experts name various causes for this, including lactic acid build-up and membrane irritation from metal tooth fillings. Another possible cause is pulmonary edema, an accumulation of fluid in the lungs. This build-up increases pressure and induces leakage of red blood cells; the iron molecules in the blood cells interact with tongue receptors. If no other symptoms are present, dysgeusia during exercise is no cause for concern.