Is it normal to gain weight right after surgery

I had my lap RNY on Monday and came home from the hospital yesterday. i stepped on my scale this morning and have gained about 12 pounts. is this normal? if so i haven't read anything about this. it was a shocker.

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.