You have rightly read that headache can be related to sinus problems or it can be due to some other conditions like migraine
. Since you already have a sinusitis
and a polyp, so first thought would be to treat it optimally and if still headache persists then medications for headache can be started. you can visit a neurologist
and he will be able to guide you regarding which medicines to take. Epilepsy or carbatrol
does not appear to be related, although that information will be important when starting you on medications for headache.