Swollen Legs ?

When the temperature is extremely hot (and it will be when we go to Icmeler the first two weeks of August), my legs swell up so much, my feet take on a Shrek like appearance and my shoes don't fit.
Does anyone know of a remedy for this ? my friend suggested water tablets but my Doctor won't prescribe them and just says I've to drink plenty of water - I do and it doesn't work. Does this happen to anyone else ?
Thanks
Karen
Does anyone know of a remedy for this ? my friend suggested water tablets but my Doctor won't prescribe them and just says I've to drink plenty of water - I do and it doesn't work. Does this happen to anyone else ?
Thanks
Karen