Aura associated with migraine is known to have nausea
vomiting, visual disturbances like blurring, tunnel
vision , slurring speech etc . Apart from others, exercise is a known trigger to migraine attacks and that’s exactly what could have happened in case of your son. Other accompanying symptoms could be increased urination, fatigue, loss of appetite, numbness, tingling or weakness, problems in concentrating, sensitivity to light or sound.