Edema is another
word for a type of swelling. With edema, you actually have an increase of
pressure and that pressure can cause pain. For instance, if you have
edema in the sinus cavities, that edema can actually push against the wall of
the skull indirectly through the sinus cavities. If it does,
you'll actually feel pressure in that area. Many times doctors are able
to tell with their patients where the pressure is just by palpating,
or pushing, that area and trying to find out where it occurs.
