I agree, yes, definitely get it checked out soon, it could be blood clots, anything, especially with pain!
she shuld.definatly consult her doctor first thing. u shuldnt have pain with the swelling she ne having fluid build.up or worse!
This question was for the mother of my soon to- be grand child, and she says, there is pain when her left leg swells
Is there pain in it? I would just mention it to your doctor to be safe, at this stage my doctor was checking me for swelling (I'm 22 weeks 4 days) so it's normal to swell, just the one leg is a little odd though.