He feels headache, nausea and vomiting.
他覺得頭痛、噁心和想吐。
He is under the weather.
他不舒服，生病了。
He began to feel unusually tired.
他感到反常的疲倦？
He feels light-headed.
他覺得頭暈。
She has been shut-in for a few days.
她生病在家幾天了。
Her head is pounding.
她頭痛。
His symptoms include loss of appetite, weight loss, excessive fatigue, fever and chills.
他的症狀有食慾和體重減輕、非常疲倦、發燒和發冷。