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Learn about your pain in one knee, including causes and common questions. Or get a personalized analysis of your pain in one knee from our A.I. health assistant. At Buoy, we build tools that help you know what’s wrong right now and how to get the right care.

Pain in One Knee Checker

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Your Pain in One Knee May Also be Known as:
Left knee hurts
Left knee pain
One knee hurts
Right knee hurts
Right knee pain

Top 10 Pain in One Knee Causes

  1. 1.Non - Specific Knee Pain

    Knee pain is a common symptom in people of all ages. It may start suddenly often as a result of injury or excessive exercise. Knee pain may also began as a mild discomfort & worsen over time.

    Your knee pain looks like it is variation of normal, which doesn't require any further testing, for now. You can take over the counter pain medication like Tylenol. If the pain becomes severe or lasts longer than a month, you should see a physician.

    Rarity:
    Common
    Top Symptoms:
    pain in one knee, spontaneous knee pain, knee pain from overuse
    Symptoms that always occur with non-specific knee pain:
    pain in one knee
    Symptoms that never occur with non-specific knee pain:
    severe knee pain, knee pain from an injury, difficulty walking
    Urgency:
    Self-treatment
  2. 2.Patellofemoral Pain Syndrome

    The kneecap (patella) is located directly in front of the thigh bone (femur), and should normally glide freely up and down. In this condition, called patellofemoral pain syndrome, the kneecap may rub against the thigh bone instead of gliding smoothly, causing damage and pain.

    You should visit your primary care physician. While you can safely take steps to treat this condition at home (avoiding strenuous use of the knee and taking over-the-counter pain medication), your doctor may coordinate care with a physical therapist to help manage your pain and function of the knee.

    Rarity:
    Common
    Top Symptoms:
    knee pain, pain in one knee, knee pain that gets worse when going up stairs, dull, achy knee pain, knee pain that gets worse when squatting
    Symptoms that always occur with patellofemoral pain syndrome:
    knee pain
    Urgency:
    Primary care doctor
  3. 3.Knee Bursitis (Pes Anserine Bursitis)

    Pes anserine bursitis is an inflammatory condition of the knee.

    You can safely treat this condition on your own with rest and over-the-counter anti-inflammatory drugs, such as aspirin, ibuprofen (Advil, Motrin), naproxen (Aleve).

    Rarity:
    Common
    Top Symptoms:
    pain in one knee, spontaneous knee pain, knee pain that gets worse when going down stairs, knee pain that gets worse when going up stairs, knee pain that gets worse when standing up
    Symptoms that always occur with knee bursitis (pes anserine bursitis):
    pain in one knee
    Urgency:
    Self-treatment
  4. 4.Meniscal Injury

    A torn meniscus is one of the most common knee injuries. Any activity that causes forceful twisting of the knee, especially when putting the pressure of one's full weight on it, can lead to a torn meniscus.

    Conservative treatment such as rest, ice and medication is sometimes enough to relieve the pain of a torn meniscus and give the injury time to heal on its own. In other cases, however, a torn meniscus requires surgical repair, which can be best determined by your doctor or physiotherapist.

    Rarity:
    Common
    Top Symptoms:
    pain in one knee, knee stiffness, pain in the inside of the knee, knee instability, knee pain from an injury
    Urgency:
    Primary care doctor
  5. 5.Iliotibial (It) Band Syndrome

    Iliotibial band (ITB) syndrome is the lateral knee pain that results from overuse that occurs after repetitive motion. It is the most common cause of lateral knee pain in runners and cyclists.

    You should go see your doctor in the coming days/weeks regarding your knee pain. He/she will assess the severity of your iliotibial band syndrome and determine the proper course of treatment (ranging from physical therapy and anti-infammatory medicine to corticosteroid injection or possibly surgery).

    Rarity:
    Common
    Top Symptoms:
    knee pain, pain in one knee, dull, achy knee pain, knee pain that gets worse when going down stairs, sharp knee pain
    Symptoms that always occur with iliotibial (it) band syndrome:
    knee pain
    Urgency:
    Primary care doctor

    Pain in One Knee Checker

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  6. 6.Hip Fracture

    A hip fracture is a break in the upper quarter of the femur (thigh) bone. The extent of the break depends on the forces that are involved, which determines the type of surgery used for treatment.

    You should seek immediate medical care at an urgent care clinic or ER as complications can become life-threatening. Treatment involves a combination of surgery, rehabilitation and medication.

    Rarity:
    Common
    Top Symptoms:
    pain in one knee, constant hip pain, groin pain, severe hip pain, pain in the outside of the hip
    Symptoms that always occur with hip fracture:
    hip pain from an injury, constant hip pain
    Urgency:
    Emergency medical service
  7. 7.Infrapatellar Bursitis

    Bursae are small fluid-filled sacks located around the body in strategic locations to provide a cushion and help reduce friction. There is a pair of bursae below each kneecap (patella). Infrapatellar bursitis is a condition where these bursae are inflamed. It is a common cause of knee pain in people whose work involves frequent kneeling on hard surfaces.

    You can safely treat this condition on your own. Rest and elevation (raising the knee up when sitting or laying down) are effective home remedies. You might also consider avoiding kneeling postures, as well as take over-the-counter medications such as ibuprofen (Advil) or acetominophen (Tylenol) to help with any pain symptoms.

    Rarity:
    Uncommon
    Top Symptoms:
    pain in one knee, spontaneous knee pain, knee pain that gets worse when going up stairs, dull, achy knee pain, knee pain that gets worse when squatting
    Urgency:
    Self-treatment
  8. 8.Knee (Mcl) Sprain

    The medical collateral ligament (MCL) links the thigh bone and the shin bone on the inner side of the knee joint. An MCL sprain is any damage done to this ligament (usually through twisting/force during sports).

    Depending on the severity of your knee pain, you should go see your doctor at your earliest convenience or go to an urgent care clinic if needed. Your doctor may prescribe you pain medication, and will ask you to refrain from physical activity and possibly partake in rehabilitation/ physical therapy.

    Rarity:
    Uncommon
    Top Symptoms:
    pain in one knee, knee injury, knee pain from an injury, pain in the inside of the knee, sports injury
    Symptoms that always occur with knee (mcl) sprain:
    pain in one knee, knee pain from an injury
    Symptoms that never occur with knee (mcl) sprain:
    mild knee pain
    Urgency:
    Primary care doctor
  9. 9.Jumper's Knee (Patellar Tendonitis)

    Patellar tendonitis (Jumper's knee) is the inflammation of the patellar tendon, which attaches the knee cap to the shin bone (tibia). This condition is caused by frequently from sports and jumping.

    You should visit your primary care doctor, who will perform a physical exam to assess for other causes of knee pain. Lab studies and imaging are typically not necessary. Treatment involves reducing activity to allow for healing, stretching, and strengthening the muscles supporting the knee.

    Rarity:
    Rare
    Top Symptoms:
    pain in one knee, spontaneous knee pain, knee pain that gets worse when going up stairs, knee pain that gets worse when squatting, knee stiffness
    Urgency:
    Primary care doctor
  10. 10.Repeated Kneecap Dislocation (Patellar Subluxation)

    Recurrent patellar subluxation is the continued instability of the kneecap, which causes anterior knee pain and usually occurs laterally. It occurs unpredictably with varying durations.

    Your doctor will be able to make a diagnosis regarding the severity of your recurrent patellar subluxation using X-ray and/or MRI. Basic rehabilitation is the preferred conservative treatment, but in certain cases surgery may be necessary to stabilize the recurring dislocations.

    Rarity:
    Uncommon
    Top Symptoms:
    pain in one knee, dull, achy knee pain, pain in the front of the knee, pain in the inside of the knee, swollen knee
    Symptoms that always occur with repeated kneecap dislocation (patellar subluxation):
    kneecap dislocation
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Pain in One Knee

  • Q.Is your knee pain getting better or worse?
  • Q.How long has your knee pain been going on?
  • Q.How severe is your knee pain?
  • Q.How would you explain the cause of your knee pain?

If you've answered yes to one or more of these questions, check our pain in one knee symptom checker.

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Pain in One Knee Symptom Checker Statistics

  • People who have experienced pain in one knee have also experienced:

    • 6% Pain in One Shoulder
    • 4% Pain in One Hip
  • People who have experienced pain in one knee had symptoms persist for:

    • 35% Over a Month
    • 30% Less Than a Day
    • 17% Less Than a Week
  • People who have experienced pain in one knee were most often matched with:

    • 52% Patellofemoral Pain Syndrome
    • 10% Knee Bursitis (Pes Anserine Bursitis)

Pain in One Knee Checker

Take a quiz to find out why you’re having pain in one knee.

Take a quiz