headache (
http://definr.com/headache)
n 1: something or someone that causes anxiety; a source of
unhappiness; "New York traffic is a constant concern";
"it's a major worry" [syn:
concern,
worry,
vexation]
2: pain in the head caused by dilation of cerebral arteries or
muscle contractions or a reaction to drugs [syn: {head
ache},
cephalalgia]