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Knee pain is a common complaint that affects people of all ages. Knee pain may be the result of an injury, such as a ruptured ligament or torn cartilage. Medical conditions — including arthritis, gout and infections — also can cause knee pain.nMany types of minor knee pain respond well to self-care measures. Physical therapy and knee braces also can help relieve knee pain. In some cases, however, your knee may require surgical repair.nWant to know more about the Knee pain? Read the TeMed report and visit

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knee pain


Knee pain is a common complaint that affects people of all ages. Knee pain may be the result of an injury,

such as a ruptured ligament or torn cartilage. Medical conditions — including arthritis, gout and

infections — also can cause knee pain.

Many types of minor knee pain respond well to self-care measures. Physical therapy and knee braces

also can help relieve knee pain. In some cases, however, your knee may require surgical repair.



The knee is one of the largest and most complex joints in the body. The knee joins the thigh bone (femur) to the shin bone (tibia). The

smaller bone that runs alongside the tibia (fibula) and the kneecap (patella) are the other bones that make the knee joint.

Tendons connect the knee bones to the leg muscles that move the knee joint. Ligaments join the knee bones and provide stability to

the knee:

• The anterior cruciate ligament prevents the femur from sliding

backward on the tibia (or the tibia sliding forward on the


• The posterior cruciate ligament prevents the femur from

sliding forward on the tibia (or the tibia from sliding backward

on the femur).

• The medial and lateral collateral ligaments prevent the femur

from sliding side to side.

Two C-shaped pieces of cartilage called the medial and lateral

menisci act as shock absorbers between the femur and tibia.

Numerous bursae, or fluid-filled sacs, help the knee move




Older adults with bone or joint conditions may experience pain in the knees. Women who are over 65 years old

may be at a higher risk than those who are younger. Young adults and teenagers may also experience knee pain

if they participate in sports or activities that require jumping, running, or similar types of active movements that

produce stressful situations on the body.

Children in their teens or preteens may experience pain from active play. The pain is more frequent in children

who jump, run, or participate in activities that require repetitive movements.



The location of the knee pain can vary depending on which structure is involved. With

infection, the whole knee might be swollen and

painful, while a torn meniscus or fracture of a bone gives symptoms only in one specific


The severity of the pain can vary as well from a minor ache to a severe and disabling


Some of the other signs and symptoms that accompany knee pain are:

• stiffness

• skin feels warm to the touch

• an audible popping, clicking or some other abnormal sound when moving the knee(s)

Serious signs and symptoms:

• pain accompanied with noticeable swelling, redness, and fever

• inability to stand

• locking of the knee- the inability to bend or straighten the knee(s)

• limping

• difficulty walking due to instability of the knee

• falling down while attempting to stand

• feeling numbness in the affected leg (knee)

• visible signs of injury, such as an abnormal appearance or malformation



Anumber of issues that affect the proper functioning of one or both knees may cause pain. Injury is the most common cause, but

other conditions such as arthritis may lead to joint deterioration and discomfort



Menisci are thin layers of cartilage located between the tibia and femur. Resembling a

crescent or disc, this connective tissue absorbs most of the stress placed on the lower

extremities, but may tear if too much stress is placed on the knees. Menisci also stabilize the

knees by prevent- ing abnormal movements that may lead to injury. Tearing of the menisci

may interfere with their proper functioning.


Direct trauma to the bony structure can cause one of the bones in the knee to break. This is

usually a very obvious and painful injury. Most knee fractures are not only painful but will also

interfere with the proper functioning of the knee (such as kneecap fracture) or make it very

painful to bear weight (such as tibial plateau fracture). All fractures need immediate medical



The knee joint can be dislocated, which is a medical emergency that requires immediate

attention. This injury often occurs during a motor-vehicle accident when the knee hits the


causes knee problems caused byinjuries

Causes: Knee problems, caused byinjuries


These types of injuries often occur when the knee receives blunt trauma or is twisted

in the wrong direction. Sprains and strains most often arise during contact sports but

may occur during any abrupt or sudden movement. These injuries are graded as

first, second, or third degree based upon how much damage has occurred. Grade-one

sprains stretch the ligament but don't tear the fibers; grade-two sprains partially tear

the fibers, but the ligament remains intact; and grade-three tears completely disrupt

the ligament.An anterior cruciate ligament injury or medial collateral ligament injury

may cause bleeding into your knee, which makes the pain worse.


Tendinitis is an inflammation that produces redness, tenderness to the touch, and intense pain in the

tendons around the knees or any area of the body that have tendons. Activities that require

repetitive movements may increase the risk of tendinitis. Other factors for inflamed tendons are poor

prepara- tion for exercise and medical conditions such as arthritis.


Inflamed bursae may cause knee pain in some people. Bursae are small pockets of fluid that


the tendons of the hips, shoulders, and knees in order for them to move freely along joints.


An injury that causes significant damage to the knee joint may cause bleeding into the joint spaces,

known as haemarthrosis. This can happen if a cruciate ligament is torn or if there is a fracture to one

of the bones of the knee.Signs of haemarthrosis are swelling of the knee, warmth, stiffness and

bruising. You should go to hospital immediately to have your knee treated if you have a very

swollen knee.

causes 1




OAis a common form of arthritis that may appear in one or more joint bones in the

body. It may affect men, women, and children. Women over the age of 55 are at the

highest risk for OA. The condition induces pain from the loss of cartilage, which causes

the bones to rub together and produce intense discomfort. It may also form from joint

malformations present at birth, injuries caused in active sports, or work conditions that

require repetitive movements.


The most debilitating form of arthritis, rheumatoid arthritis is an autoimmune condition

that can affect almost any joint in your body, including your knees. Although

rheumatoid arthritis is a chronic disease, it tends to vary in severity and may even come

and go.


This type of arthritis occurs when uric acid crystals build up in the joint. While gout

most commonly affect the big toe, it can also occur in the knee.


Pseudogout, a common type of arthritis in the knees, develops when calcium pyrophosphate crystals (a type of salt) form in the

knees’fluids. Often confused with gout (another condition formed from fluid crystals), pseudogout may be misdiagnosed in some

people. It produces painful episodes of swelling and inflammation in the knees as well as other joints.


Sometimes your knee joint can become infected, leading to swelling, pain and redness. There's usually no trauma before the onset of

pain. Septic arthritis often occurs with a fever.

causes 2



Some examples of mechanical problems that can cause knee pain include:


Sometimes injury or degeneration of bone or cartilage can cause a piece of bone or cartilage to break

off and float in the joint space. This may not create any problems unless the loose body interferes with knee

joint movement, in which case the effect is something like a pencil caught in a door hinge.


This occurs when the triangular bone (patella) that covers the front of your knee slips out of place,

usually to the outside of your knee. In some cases, the kneecap may stay displaced and you'll be able

to see the dislocation.


If you have hip or foot pain, you may change the way you walk to spare these painful joints. But this

altered gait can place more stress on your knee joint. In some cases, problems in the hip or foot can

refer pain to the knee.

causes 3




Chondromalacia is a general term used to describe the breakdown or

soften- ing of the cartilage found in the body. Chondromalacia of the

patella affects only the kneecaps. Damaged kneecaps may become

misplaced from constant or persistent use. It often affects females more

than males, but may cause bouts of pain for anyone who is very active in



Osgood-Schlatter disease is an inflammation of the bone, cartilage, and/or tendon at the top of the

shinbone (tibia), where the tendon from the kneecap (patella) attaches. It is most often seen in

young adolescents. Most often only one knee is affected.

risk factors


Anumber of factors can increase your risk of having knee problems, including:

• Excess weight. Being overweight or obese increases stress on your knee joints, even during ordinary activities such as walking or

going up and down stairs. It also puts you at increased risk of osteoarthritis by accelerating the breakdown of joint cartilage.

• Biomechanical problems. Certain structural abnormalities — such as having one leg shorter than the other, misaligned knees and

even flat feet — can make you more prone to knee problems.

• Lack of muscle flexibility or strength. A lack of strength and flexibility are among the leading causes of knee injuries. Tight or weak

muscles offer less support for your knee because they don't absorb enough of the stress exerted on the joint.

• Certain sports. Some sports put greater stress on your knees than do others. Alpine skiing with its rigid ski boots and potential for

falls, basketball's jumps and pivots, and the repeated pounding your knees take when you run or jog all increase your risk of knee


• Previous injury. Having a previous knee injury makes it more likely that you'll injure your knee again.



During the physical exam, your doctor is likely to:

• Inspect your knee for swelling, pain, tenderness, warmth and visible bruising

• Check to see how far you can move your lower leg in different directions

• Push on or pull the joint to evaluate the integrity of the structures in your knee


In some cases, your doctor might suggest tests such as:

• X-ray. Your doctor may first recommend having an X-ray, which can help detect

bone fractures and degenerative joint disease.

• Computerized tomography (CT) scan. CT scanners combine X-rays taken from

many different angles, to create cross-sectional images of the inside of your body. CT

scans can help diagnose bone problems and detect loose bodies.

• Ultrasound. This technology uses sound waves to produce real-time images of the

soft tissue structures within and around your knee, and how they are working. Your

doctor may want to maneuver your knee into different positions during the

ultrasound, to check for specific problems.

• Magnetic resonance imaging. MRI uses radio waves and a powerful magnet to create 3-D images of the inside of your knee. This

test is particularly useful in revealing injuries to soft tissues such as ligaments, tendons, cartilage and muscles.


If your doctor suspects an infection, gout or pseudogout, you're likely to have blood tests and sometimes arthrocentesis, a

procedure in which a small amount of fluid is removed from within your knee joint with a needle and sent to a laboratory for





If you have an injury that may require surgery, it's usually not necessary to have the operation

imme- diately. Before making any decision, consider the pros and cons of both nonsurgical

rehabilitation and surgical reconstruction in relation to what's most important to you. If you choose

to have surgery, your options may include:

•Arthroscopic surgery. Depending on your injury, your doctor may be able to examine and repair

your joint damage using a fiber-optic camera and long, narrow tools inserted through just a few

small incisions around your knee. Arthroscopy may be used to remove loose bodies from your

knee joint, remove or repair damaged cartilage, and reconstruct torn ligaments.

•Partial knee replacement surgery. In this procedure (unicompartmental arthroplasty), your

surgeon replaces only the most damaged portion of your knee with parts made of metal and

plastic. The surgery can usually be performed with a small incision, and your hospital stay is

typically just one night. You're also likely to heal more quickly than you are with surgery to replace

your entire knee.

•Total knee replacement. In this procedure, your surgeon cuts away damaged bone and cartilage

from your thighbone, shinbone and kneecap, and replaces it with an artificial joint made of metal

alloys, high-grade plastics and polymers.

treatment 1



Self-care measures for an injured knee include:

•Rest. Take a break from your normal activities to reduce repetitive strain on your knee,

give the injury time to heal and help prevent further damage. A day or two of rest may

be all you need for a minor injury. More severe damage is likely to need a longer

recovery time.

•Ice. Ice reduces both pain and inflammation. A bag of frozen peas works well because it

covers your whole knee. You can also use an ice pack wrapped in a thin towel to protect

your skin. Although ice therapy is generally safe and effective, don't use ice for longer

than 20 minutes at a time because of the risk of damage to your nerves and skin.

•Compression. This helps prevent fluid buildup in damaged tissues and maintains knee

alignment and stability. Look for a compression bandage that's lightweight, breathable

and self-adhesive. It should be tight enough to support your knee without interfering

with circulation.

•Elevation. To help reduce swelling, try propping your injured leg on pillows or sitting

in a recliner.



Although it's not always possible to prevent knee pain, the following suggestions may

help forestall injuries and joint deterioration:

•Keep extra pounds off. Maintain a healthy weight; it's one of the best things you can

do for your knees. Every extra pound puts additional strain on your joints, increasing

the risk of injuries and osteoarthritis.

•Be in shape to play your sport. To prepare your muscles for the demands of sports

participation, take time for conditioning. Work with a coach or trainer to ensure that

your technique and movement are the best they can be.

•Get strong, stay limber. Because weak muscles are a leading cause of knee injuries,

you'll benefit from building up your quadriceps and hamstrings, which support your

knees. Balance and stability training helps the muscles around your knees work

together more effectively. And because tight muscles also can contribute to injury,

stretching is important. Try to include flexibility exercises in your workouts.

•Be smart about exercise. If you have osteoarthritis, chronic knee pain or recurring

injuries, you may need to change the way you exercise. Consider switching to

swimming, water aerobics or other low-impact activities — at least for a few days a

week. Sometimes simply limiting high-impact activities will provide relief.