What’s the problem?

有什么问题吗？

What are your symptoms?

你有些什么症状？

How are you feeling today?

您今天感觉怎么样？

Are you feeling any better?

你感觉好点了吗？

Do you have any allergies?

您有任何过敏症吗？

How long have you been feeling like this?

你有这种感觉已经多久了？

Do you have any medicine to take?

你有什么药要服用吗？

Talking about general illness: 聊一聊小病小痛

I’ve got a slight headache.

我有点头痛。

I’ve got a sore throat.

我喉咙痛。

I have a high blood pressure.

我有高血压。

I have pain in my back.

我背疼。

I’m in a lot of pain.

我疼得厉害。

My head is spinning.

我的头在打转。

I’m having difficulty breathing.

我呼吸有困难。

I have a stomach ache.

我肚子痛。

I’m not sleeping very well at the moment.

我现在睡眠不太好。

I’m not feeling very well.

我觉得不太舒服。