He is under the weather.

他不舒服，生病了

She has been shut-in for a few days.

她生病在家幾天了。

He began to feel unusually tired.

他感到反常的疲倦

He feels exhausted/fatigued most of the time.

他大部份時間都覺得非常疲倦。

He has been lacking in energy for some time.

他感到虛弱有段時間了。

He feels light-headed.

他覺得頭暈。

Her head is pounding.

她頭痛。

He feels as though everything around him is spinning.

他感到周圍的東西都在打轉。

He has noticed some loss of hearing.

他發覺聽力差些。

She has some pains and itching around her eyes.

她眼睛四周又痛又癢。

He feels drowsy, dizzy and nauseated.

他覺得昏昏欲睡，頭暈目眩和想吐

He feels headache, nausea and vomiting.

他覺得頭痛、惡心和想吐

His symptoms include loss of appetite, weight loss, excessive fatigue, fever and chills.

他的癥狀包括沒有食欲、體重減輕、非常疲倦、發燒和發冷。