Philips HP5230/01 User Manual page 6

In most of these cases fluid retention is affecting the fatlayer.
Women tend to retain more fluid than men, especially in their
legs. This water retention also affects the fat tissue in the skin
resulting in excess fluid around the fat cells. This adds to the
puffiness of the mattress and make the Cellulite layer swell.
If this fluid retention is allowed to continue for months and
years, the fat deposits thicken and harden, and eventually hard
lumps are being formed. These lumps can then be seen through
the skin without squeezing.
This chronic situation can be painful when squeezed or pinched,
and is, unlike the light and medium forms of Cellulite, almost
irreversible.
Try the Pinch Test
To check whether you have problems with fluidretention in your
legs you can gently pinch the skin of your upper thigh and try to
lift it away from the underlying layers.
If this hurts, especiallly when you then press it, it could be a first
indication of water retention and additional swelling of the
Cellulite layer.
Two simple tests to determine what stage of Cellulite
you have.
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Top left: The Pinch Test
Above: The Squeeze Test
Left: Cellulite