Imagine two friends who are talking about the reclusion that one of them is dealing with it. The one who is OK, wants to ask the other one what has caused him to live in that way during the couple of weeks / months ago. Does the sentence below work here? If yes, is it natural and if not how shall I indicate such a thing to a native speaker?
- What’s the reason (behind your / for) your reclusion?
Or perhaps:
- You've lived in reclusion for several months. What is the reason behind it?