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อาการ　คลื่นไส้　หาย　หรือเปล่า　คะ

อาการ　คลื่นไส้　หาย　หรือเปล่า　คะ
Is your nausea gone?
From Lesson 253:State-change verbs (หาย)·Thai

Questions & Answers about อาการ　คลื่นไส้　หาย　หรือเปล่า　คะ

Why does หาย mean 'gone' or 'recovered' here instead of 'lost'?
หาย means 'to disappear' or 'to be lost' when talking about physical objects. But when used with an illness, symptom, or negative state (like อาการคลื่นไส้), it means the bad condition has disappeared. In English, we usually translate this as being 'cured' or having 'recovered'.
The lesson shows หาย placed before an illness, like หายป่วย (recovered from being sick). Why is หาย placed after the illness here?
It depends on the subject of the sentence! Here, the symptom itself (อาการคลื่นไส้) is the subject, so หาย acts as the verb: 'The nausea disappeared.' If you want to put หาย first, the person is the implied subject: หายคลื่นไส้หรือเปล่า means '(Have you) recovered from nausea?'. Both structures are very common.
I know การ turns regular verbs into nouns. Is อาการ doing the same thing to คลื่นไส้?
Exactly, but with a specific medical twist. While การ turns general verbs into nouns, อาการ means 'symptom' or 'condition'. It is used as a prefix to turn a physical or mental feeling into a noun describing a state. So คลื่นไส้ (to feel nauseous) becomes อาการคลื่นไส้ (nausea).
Could I use the standard question word ไหม instead of หรือเปล่า?
Yes, you could say หายไหมคะ and it would still mean 'Is it gone?'. However, หรือเปล่า (literally 'or not') is often used when you are verifying an assumption or checking up on a changing state, making it a very natural fit for asking if a patient's symptom has finally gone away.

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