Fluids (lymph) retention is a phenomenon that could happen to everyone for several reasons that go from sitting or standing for too long, to being over-weight or inactive for long periods, because of pregnancy, etc.

The first symptom to be noticed is puffiness/swelling on top of the feet at the ankles sites and legs.

Foot Reflexology Lymph Drainage treatments stimulate the Lymphatic System Glands to faster interactions act to  

increase the fluid circulation speed throughout the system. This process enables faster gathering of all the body waste to guarantee a more expedited execration of the "garbage". Old cells, unnecessary fats, debris etc. compel these stuff towards the exit to ensure they get expelled out through the urinary and digestive systems.

Said cleaning functions produce cellulite/fats break-down, ease tension, help post-injury/surgery swelling go down, detoxify, regenerate, give new glow to the skin and much more. In other words, they rejuvenate the body.