Definition

Knee pain is a common symptom in people of all ages. It may start suddenly, often after an injury or exercise. Knee pain may also began as a mild discomfort, then slowly worsen. 

Alternative Names

Pain – knee

Common Causes

Simple causes of knee pain often clear up on their own with self care. Being overweight can put you at greater risk for knee problems.

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Knee pain can be caused by:

  • Anterior knee pain
  • Baker’s cyst — a fluid-filled swelling behind the knee that may occur with swelling (inflammation) from other causes, like arthritis
  • Bursitis — inflammation from repeated pressure on the knee, such as kneeling for long periods of time, overuse, or injury
  • Connective tissue disorders such as lupus
  • Dislocation of the kneecap
  • Iliotibial band syndrome — a hip disorder from injury to the thick band that runs from your hip to the outside of your knee
  • Infection in the joint
  • Knee injuries — an anterior cruciate ligament injury or medial collateral ligament injury may cause bleeding into your knee, which makes the pain worse
  • Osgood-Schlatter disease
  • Tendinitis — a pain in the front of your knee that gets worse when going up and down stairs or inclines
  • Torn cartilage (a meniscus tear) — pain felt on the inside or outside of the knee joint
  • Torn ligament (ACL tear) — leads to pain and instability of the knee
  • Strain or sprain — minor injuries to the ligaments caused by sudden or unnatural twisting

Less common conditions that can lead to knee pain include bone tumors.

Knee Pain Myths and Facts">Knee pain only happens to older people.The correct answer is myth. Knee pain can occur in people of all ages. It may start suddenly, after an injury or exercise. It also may begin as mild pain that slowly worsens over time.Being overweight can put you at higher risk for knee problems.The correct answer is fact. Every extra pound you carry adds about five extra pounds of pressure on your knees when you go up and down stairs. If you need to shed a few pounds, talk with your doctor about healthy ways to lose weight.If you have knee pain, it’s probably arthritis.The correct answer is myth. Arthritis is a common cause of knee pain, but there are many others. These include bursitis, tendinitis, sprains, and strains. If minor knee pain doesn’t go away after three days of home treatment, see your doctor.Heat is the best treatment for any new knee pain.The correct answer is myth. When you have new knee pain, it’s best to apply ice. Cover your knee with a towel and place ice on it for 15 minutes at a time. At first, you can use it every hour for up to 15 minutes. After the first day, use it at least four times a day. Other treatments include resting your knee and keeping it raised.Bursitis is often caused by overuse of your knee.The correct answer is fact. Bursitis is the swelling and irritation of the bursa. This is a fluid-filled sac that acts as a cushion between muscles, tendons, and joints. You can get bursitis from suddenly becoming more active or from being overweight. You may notice redness and swelling around the knee and stiffness or pain when you move your knee.Standing can make knee pain from bursitis worse.The correct answer is true. To relieve the pain, try not to stand for long periods and place a pillow between your knees when sleeping on your side. You can use ice up to four times a day, 15 minutes at a time for the first two to three days to relieve pain.Pain in the front of the knee is often caused by:The correct answer is all of the above. Stretching and strengthening the muscles in the front and the back of the leg help with this type of knee pain. Ask your doctor or physical therapist to show you exercises for your upper leg muscles.If you have pain in the front of the knee, it may help to:The correct answer is all of the above. While exercise is good for your joints, certain high-impact activities can do more damage than good if you have joint pain. Taking steps to reduce the impact on your knees during exercise can help protect your joints.Warming up and stretching before exercise helps protect your knees.The correct answer is fact. Warming up will help reduce the pressure on your knees during exercise. Start by walking for a few minutes. Then stretch the muscles in the front and back of your thighs to reduce tension in the knee. Ask your doctor or physical therapist for other suggestions for stretching.If you hear a “popping” sound when you injure your knee, it’s most likely:The correc
t answer is E. If you have one of these knee injuries, you will often feel the symptoms right away. You may also have knee swelling, knee pain when walking, or locking or catching of the knee. If you have any of these symptoms, call your doctor right away.
Physical therapy is most helpful for which kind of knee pain?The correct answer is all of the above. Physical therapy can teach you exercises to make your knee stronger. A physical therapist may also use certain treatments to help relieve your knee pain. Ask your doctor if you should have physical therapy for your knee pain.

Home Care

For knee pain that has just started:

  • Rest and avoid activities that aggravate your pain, especially weight bearing activities.
  • Apply ice. First, apply it every hour for up to 15 minutes. After the first day, apply it at least four times per day.
  • Keep your knee raised as much as possible to bring any swelling down.
  • Wear an ace bandage or elastic sleeve, which you can buy at most pharmacies. This may reduce swelling and provide support.
  • Take acetaminophen for pain or ibuprofen for pain and swelling.
  • Sleep with a pillow underneath or between your knees.

For knee pain related to overuse or physical activity:

  • Always warm up before exercising and cool down afterward. Stretch your quadriceps and hamstrings.
  • Avoid running straight down hills — walk down instead.
  • Bicycle or swim instead of run.
  • Reduce the amount of exercise you do.
  • Run on a smooth, soft surface, such as a track, instead of on cement.
  • Lose weight if you are overweight. Every pound that you are overweight puts about 5 extra pounds of pressure on your knee cap when you go up and down stairs. Ask your health care provider for help losing weight.
  • If you have flat feet, try special shoe inserts and arch supports (orthotics).
  • Make sure your running shoes are made well, fit well, and have good cushioning.

Tips to relieve knee bursitis pain:

  • Use ice three to four times a day for the first 2 or 3 days. Cover your knee with a towel and place ice on it for 15 minutes. Do not fall asleep while using ice. You can leave it on too long and get frostbite.
  • Try not to stand for long periods of time. If you must stand, do so on a soft, cushioned surface. Stand with an equal amount of weight on each leg.
  • When you sleep, do not lie on the side that has bursitis. Place a pillow between your knees when you lie on your side to help decrease your pain.
  • Wear flat shoes that are cushioned and comfortable.
  • If you are overweight, losing weight may help.

Call your health care provider if

Call your doctor if:

  • You cannot bear weight on your knee
  • You have severe pain, even when not bearing weight
  • Your knee buckles, clicks, or locks
  • Your knee is deformed or misshapen
  • You have a fever, redness or warmth around the knee, or significant swelling
  • You have pain, swelling, numbness, tingling, or bluish discoloration in the calf below the sore knee
  • You still have pain after 3 days of home treatment

What to expect at your health care provider’s office

Your health care provider will perform a physical examination, with careful attention to your knees, hips, legs, and other joints.

To help diagnose the cause of the problem, your health care provider will ask medical history questions, such as:

  • When did your knee first begin to hurt?
  • Have you had knee pain before? What was the cause?
  • How long has this episode of knee pain lasted?
  • Do you feel the pain all the time, or off and on?
  • Are both knees affected?
  • Is the pain in your entire knee or one location, like the kneecap, outer or inner edge, or below the knee?
  • Is the pain severe?
  • Can you stand or walk?
  • Have you had an injury or accident involving the knee?
  • Have you overused the leg? Describe your usual activities and exercise routine.
  • What home treatments have you tried? Have they helped?
  • Do you have other symptoms, such as pain in your hip, pain down your leg or calf, knee swelling, swelling in your calf or leg, or fever?

The following tests may be done:

  • Joint fluid culture (fluid taken from the knee and examined under a microscope)
  • MRI of the knee if a ligament or meniscus tear is suspected
  • X-ray of the knee

Your doctor may inject a steroid into the knee to reduce pain and inflammation.

You may need to learn stretching and strengthening exercises and podiatrist (to be fitted for orthotics).

In some cases, you may need surgery.

Prevention

 
 

Related:ACL reconstruction – discharge , Knee arthroscopy – discharge , Hip or knee replacement – after – what to ask your doctor , Hip or knee replacement – before – what to ask your doctor , Knee microfracture surgery, Knee arthroscopy, Knee joint replacement, ACL reconstruction

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