How much water are you drinking? Since the lemon juice in the lemonaide is a natural diuretic it could be causing some edema. If that's the case drinking more water should clear it right up. Swelling is more common in warm weather because it's harder to keep hydrated.
The standard water intake need on the Master-Cleanse is half your weight in ounces but you may need even more if it's hot where you are. Good luck and let us know how you are doing.