Researchers at the University of Catania have found that people who have multiple sclerosis (MS) are more likely to suffer from headaches than people who do not have the disease. In a new study, the researchers screened 101 MS patients and 101 controls for headaches. They found that about 57 percent of the MS patients fulfilled the diagnostic criteria for headache, compared to 38 percent of people in the control group. Investigators say brainstem lesions may be behind the MS, headache link.