Final answer:
Lev's disturbance likely relates to financial concerns, hinted by a dialogue about the characters not needing to economise, however, specifics are not provided in the text.
Step-by-step explanation:
In the scene referenced from the play, the disturbance Lev experiences is not explicitly described in the provided text. However, it can be inferred that Lev, likely to be a character akin to Helmer in Henrik Ibsen's 'A Doll's House', is disturbed by the notion of excessive spending or financial imprudence as suggested by another character's dialogue about not needing to economise for Christmas. The passage provided indicates troubled circumstances, symbolised by the dishevelled Christmas Tree and the reference to money spending, but without more context, the specific details of Lev's disturbances remain unclear within this snippet.