If there was no history of head trauma, this could indeed be due to primary headaches such as migraine, tension or
cluster headaches. Avoidance of triggers, rest, ice pack
and both preventive
and abortive medications usually help provide relief. OTC pain medications which are taken excessively may also lead to rebound headaches. If there is no insurance, ask your local health department if there are free clinics that you could avail.