Blood test may spot dangerous headaches in the ER

This study looked at whether measuring a protein called S100B in the blood can help emergency doctors tell the difference between common headaches (like migraines) and headaches caused by a more serious problem (like bleeding or infection). 81 adults with bad headaches but no recent head injury took part. Researchers compared their S100B levels and MRI scans to see if the protein could be a quick, reliable clue. The final diagnosis was confirmed by a panel of experts one month later.