My stomach is big and swollen when i stand but disappears when i lay down...its also worse of a night...?

Maybe ok, maybe not: Depending on a person's medical history, her physical body shape, her muscle tone, etc.., a protruding tummy may or may not be ok. An internal mass or organ that is big enough will appear as a protruding tummy. Excess fluid in the abdomen also shows up as a big tummy. For somebody with thin, weak abdominal muscles, a big meal can be protruding, so a doctor should evaluate to see what is happening.