I have a dull pain.

隐隐作痛。

I have a sharp pain.

钻心地疼。

I have a throbbing pain.

一跳一跳地疼。

I have a piercing pain

我感到刺骨的疼痛。

I have a stabbing pain.

像针扎似地疼。

I have food poisoning.

我食物中毒了。

I have high/low blood pressure.

我血压高/低。

She passed out.

她昏过去了。

I feel sick.

我觉得难受。

I don't feel well./ I feel bad. / I feel sluggish. /I feel tired.

我浑身没劲。

I don't have any appetite.

我没有一点儿食欲。

I have a slight cold.

我有点儿感冒。

I feel chilly. /I feel chilly.

我浑身发冷。

I have a bad cold.

我得了重感冒。

I have a bit of a fever.

我有点儿发烧。

My fever has gone down.

我退烧了。

I feel like throwing up. I feel nauseous.

我想吐。

It's itchy.

我觉得痒。

I burned my hand.

我把手给烫了。