S.P. is 32-year-old woman is seen in the emergency department complaining of a severe headache and nausea. She reports a history of headaches off and on for the past month, typically unilaterally and without warning. In addition, she reports that the headaches occur at varying times of the day. She also complains of a stiff neck. Select a potential diagnosis for S.P. and describe the pathophysiology of that diagnosis. How does the pathophysiology explain S.P.s description of her symptoms?

S.P. is 32-year-old woman is seen in the emergency department complaining of a severe headache and nausea. She reports a history of headaches off and on for the past month, typically unilaterally and without warning. In addition, she reports that the headaches occur at varying times of the day. She also complains of a stiff neck. Select a potential diagnosis for S.P. and describe the pathophysiology of that diagnosis. How does the pathophysiology explain S.P.s description of her symptoms?