Collapsed lung - Spontaneous pneumothorax

Hello,

A very close friend of mine had spontaneous pneumothorax (collapsed lung). Other than that he is pretty healthy.
He had it the first time last year and a second time in the beginning of June this year. He had a surgery performed in which the collapsed part of the lung is stapled I believe.
Anyway, today he went for another X-Ray after the returned home from the hospital. The X-Ray doesn't look good. It looks like there is some fluid build up in the lung where the procedure was performed. His doctor is not available today and he and his mother are freaking out. His doctor might be able to see hm only on Monday.
I am trying to help by providing some comfort or finding information online that would be of any help.
In plain English the question is if his life is in immediate danger and if he should seek an emergency room.

I would appreciate any information.

Thank you!