Can exercise cause headache?

Primary exercise headache is brought on by and occurring only during or after sustained strenuous physical exercise. The headache lasts less than 48 hours and is in the absence of any other disease process within the head such as a brain bleed, blood vessel tear, or other vessel disorder. Primary exercise headache can occur more frequently in hot weather or at high altitude. Although primary exercise headache can occur in patients with migraine headache, which may also be triggered by exercise, primary exercise headache is a separate headache disorder.