Looking on the internet deeply has found these results:

I have a terrible headache is the most popular phrase on the web.

have a serious painful headache 10 results on the web	I have a terrible headache 12,850 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	I have a headache � I have a terrible headache � I have a terrible migraine ( headache). I have headache / I am having a headache I have a terrible headache. (herrsilen); [S] � [T] I have a bad headache today. (CK) ; [S] � [T] Tom has a pounding headache. (CK); [S] � [T] Tom woke up with a headache. (Spamster); [S] � [T] You're giving me a headache. (CK); [S] � [T] Do you still�... grammar. I've had a headache for a week. grammar ice cream headache � In the grip of a tension headache Jul 7, 2012 ... Headache bad!? I have a terrible headache seriously painful I took a 10mg norco what else can I do besides avoid annoying lights and sounds.any herbs or stretching ... 1 answer � 7 Mar 2012�... Sep 22, 2013 ... I have a terrible headache all day, everyday, without fail. It's got to the point now that I'm stressed; fed up, hardly sleeping, can't concentrate at uni or any time really. Please understand that the pain never goes, the headache�...

have a serious painful headache

10 results on the web

I have a terrible headache

12,850 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

I have a headache � I have a terrible headache � I have a terrible migraine ( headache). I have headache / I am having a headache
I have a terrible headache. (herrsilen); [S] � [T] I have a bad headache today. (CK) ; [S] � [T] Tom has a pounding headache. (CK); [S] � [T] Tom woke up with a headache. (Spamster); [S] � [T] You're giving me a headache. (CK); [S] � [T] Do you still�...
grammar. I've had a headache for a week.
grammar ice cream headache � In the grip of a tension headache
Jul 7, 2012 ... Headache bad!? I have a terrible headache seriously painful I took a 10mg norco what else can I do besides avoid annoying lights and sounds.any herbs or stretching ... 1 answer � 7 Mar 2012�...
Sep 22, 2013 ... I have a terrible headache all day, everyday, without fail. It's got to the point now that I'm stressed; fed up, hardly sleeping, can't concentrate at uni or any time really. Please understand that the pain never goes, the headache�...