Can high levels of lactic acid identified from blood sample be an indicator or cause of migraine headaches?

No: Elevated lactic acid levels suggest heart. liver or lung problems (can also be associated with signif infection or anemia). Levels are up when non-aerobic respiration occurring in body. Can mean not enough oxygen to area(s) in body. Please discuss with your doctor. But to my knowledge, not associated with migraine headaches as a cause or trigger. Best of luck with this. Dr R

Not directly: The high lactic acid may indicate metabolic problem......may be connected to HA.