> Water on the Knee
What is Water on the Knee?
Water on the knee, also
known as knee effusion, occurs when excess fluid is
produced in the knee when it is irritated, either from
injury or overuse. If the fluid is in the bursa, which
is in front of the kneecap, then water on the knee is
a form of bursitis. It also can be produced by the synovium,
a tissue around the knee that lubricates the joint and
nourishes cartilage around the knee. All joints are
surrounded by a sheath that is called a capsule. The
synovium, which is the inner lining of the capsule,
produces synovial fluid.
Water on the knee has been known as
"housemaid's knee" because it often happens
to people who kneel frequently or constantly while working
or playing. Most sports and activities do not require
kneeling, though baseball and softball catchers spend
a great deal of time squatting. Though many injuries
to the knee can cause excessive fluid in the joint,
water on the knee is most often the result of overuse.
Many conditions and injuries also can cause your knee
to become irritated and lead to water on the knee. If
it is caused by an injury or condition, it may be best
for you and your doctor to find out the root of the
problem and to have that problem resolved.
If left untreated, water on the knee
is likely to persist, causing pain and discomfort.
There usually are three parts to an
orthopedic evaluation: medical history, a physical examination,
and tests that your physician may order.
likely will ask about your activities, which may have
caused water on the knee. He will probably ask when
the soreness or pain began, and if you have had any
prior knee injuries.
| PHYSICAL EXAMINATION
Your physician can tell if there is
excess fluid in your knee by pressing a hand on one
side of your knee and then the other, looking for a
bulge that indicates fluid.
(magnetic resonance imaging) can detect any excess fluid
in the knee.