I've got a terrible headache.
headache 英[ˈhedeɪk] 美[ˈhɛdˌek]
n. 头痛; 令人头痛的事;
[例句]Headache disorders are among the most common medical conditions world-wide.
头痛症是全世界最常见的医学病症之一。
I have a bad headache.
My head is badly painful.
My headache very fiercely
I have a terrible headache