Does cremation hurt after death? What if he was cremated before he died?

I won't. After death, the soul leaves the body about 24 hours later, so it is reasonable to stop for three to seven days in folk customs, that is, to prevent relatives from coming back from the dead.

There are indeed cases in which people who faked their deaths were cremated. One is that their relatives have not stopped for three days, and the other is that even if the deceased faked his death or slept for more than three days, it would only be unlucky. Fortunately, this situation is extremely rare.