I feel poorly.

我觉得不舒服。

I feel rather unwell.

我觉得相当不舒服。

My stomach is upset.

我的胃不舒服。

I'd feel sick(awful/terrble).

我的确感到不舒服/很难受。

I feel (become) feverish./I feel like I'm burning up.

我觉得我发烧。

I feel hot and cold.

我觉得一阵冷一阵热。

I'm afraid I've got a temperature.

我恐怕发烧了。

I keep feeling dizzy.

我一直觉得头晕。

I feel dizzy and I've got no appetite.

我头晕，没有胃口。

I feel sick.

我觉得想吐。

I threw up (vemited/retched).

我吐了。

I've been throwing up.

我一直在吐。

I cough much at night./I cough a great deal at night.

晚上我咳得厉害。

I feel numb in my left arm.

我感到左臂麻木。

I feel a pain in my left leg.

我觉得左腿疼痛。

I feel a dull pain in the stomach.

我觉得胃部隐隐作痛。

I've got a pain In my back.

我背痛。

I feel a great pain here.

这儿很痛。

I have a splitting headache.

我头痛得像要裂开了。

I seem to have pain all over.

我似乎浑身都痛。

It hruts terrible.

痛得很厉害。

It's not a sharp pain；just start a dull ache.

不是剧痛，只是有些隐隐地痛。

I've been having pains in my chest recently.

近来我的胸口一直痛。

I feel shivery and I’ve got a sore throat.

我觉得怕冷，而且喉咙痛。

My eyes have been sore.

我的眼睛痛。

My tooth is acting up again.

我的牙齿又痛起来了。

One of my teeth troubles me.

我有一颗牙痛。

One of my upper teeth is loose and acting.

我的一颗上牙松动而且疼痛。

The pain's been keeping me awake.

这疼痛让我睡不着觉。

I have a stuffed-up nose.

我鼻塞。

I'm suffering from insomnia.

我失眠了。

I've been losing sleep.

我一直失眠。

I've got a humming.

我有耳鸣。

My right eardrum has become infected.

我的右耳鼓已经感染了。

My eyesight is falling.

我的视力在衰退。

My whole body feels weak.

我觉得浑身虚弱无力。

I just feel all pooped out.

我觉得筋疲力尽。

My memory is poor.

我的记忆力不好。

I think I have pneumonia( malaria/appendicitis).

我想我得了肺炎（疟疾/阑尾炎）。