I'm told that i can't take plain water during confinement otherwise the swelling of my tummy will not subside; we are only allowed to take red dates and longan drink. Is this true?

All these are supposed to be myth however, to play safe, I followed as well for all my confinement. I wouldn't 1 2 take the risk for any reasons. However, I know that the food we take are very heaty so I try to take lots of fluids in terms of soup instead of plain water. I take soup every meal and drinks longan red date tea as plain water.