A 37 years old woman presents with a 12-year history of episodic headaches. She experiences these 4 times a week, typically beginning at the end of a workday. The pain is generalized and described as similar to wearing a tight band around her head. The headaches are bothersome, but not disabling, and she denies any nausea or vomiting. She is slightly sensitive to noise but has no photophobia. Pain during her attacks typically responds to ibuprofen. Examination reveals tenderness of her scalp and both trapezius muscles. What potential sequelae do you need to be concerned about?