head ache head ache /ˈhed eɪk/

noun

1. Pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs  ( cephalalgia , head ache , headache )
   pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs
    I have a headache and need to take some painkillers
   I have a headache and need to take some painkillers