My legs (lower) are badly badly swollen. I had a lot of salty food last night. Please help?

Avoid salt! You may be sensitive to salt and be retaining some fluid. Salty food in moderation is fine for most people, but can be a problem for people with high blood pressure or heart failure. Try unsalted crunchy snacks like fresh fruits and vegetables or using spices to replace the salt. You should consider seeing your health provider for persistent swelling.