I feel sick as a dog.
我病的厉害.
I ate someth
ing bad, and now I've got the diarrhea.
我吃了些变质的东西.所以现在拉肚子.
I've got the runs.
我觉得我要吐了.
My
head/stomach is killing me.
我的头/胃疼死了.
I think I've caught a cold.
我觉得我感冒了.
I have a running nose.
我流鼻涕了.
I'm too sick to even get out of bed.
我病得连床都下不了.
I ache all over.
我浑身酸痛.
I feel feverish.
我有点发烧.
It hurts right here.
就这儿疼.