My sun (10 years ) had a PV shunt since he was 4 months old ( 10 years ago), shunt was ok all the time except some horrible headache occur from time to time especially when he gets any flu or other inflictions, he then starts to vomit and complain a headache. that stops with the symptoms of flu ends. Nowadays he complains a horrible headache with some vomiting some times that prevents him from sleeping.
what shali I do please?