Read below about moderate knee pain, including causes and common questions. Or get a personalized analysis of your moderate knee pain 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.

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A.I. Health Assistant Causes for Moderate Knee Pain

The list below shows results from the use of our A.I. Health Assistant by Buoy users who experienced moderate knee pain. This list does not constitute medical advice.

  1. 1.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.

    Condition goes away on its own in a few weeks.

    Rarity:
    Uncommon
    Top Symptoms:
    pain in one knee, spontaneous knee pain, dull, achy knee pain, knee pain that gets worse when going up stairs, knee pain that gets worse when squatting
    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.

    Most people get better within weeks to months of physical therapy.

    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.

    Days to weeks (up to 8 weeks)

    Rarity:
    Common
    Top Symptoms:
    pain in one knee, knee pain that gets worse when going up stairs, spontaneous knee pain, knee pain that gets worse when going down 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.Knee Arthritis

    Arthritis is inflammation of one or more of the joints. Pain, swelling, and stiffness are the primary symptoms of arthritis. Any joint in the body may be affected by the disease, but it is particularly common in the knee.

    Knee arthritis is a chronic problem once it develops.

    Rarity:
    Common
    Top Symptoms:
    pain in both knees, knee stiffness, knee instability, swollen knee, morning joint stiffness
    Symptoms that always occur with knee arthritis:
    pain in both knees
    Urgency:
    Primary care doctor
  5. 5.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.

    1 month with rest

    Rarity:
    Rare
    Top Symptoms:
    pain in one knee, spontaneous knee pain, knee pain that gets worse when going up stairs, knee stiffness, knee pain that gets worse when squatting
    Urgency:
    Primary care doctor

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  6. 6.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.

    6 to 8 weeks

    Rarity:
    Common
    Top Symptoms:
    pain in one knee, knee stiffness, knee instability, pain in the inside of the knee, swollen knee
    Urgency:
    Primary care doctor
  7. 7.Iliotibial (It) Band Syndrome ('Runner's Knee')

    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.

    Within 6 to 8 weeks with conservative nonsurgical treatment

    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 ('runner's knee'):
    knee pain
    Urgency:
    Primary care doctor
  8. 8.Prepatellar Bursitis

    Prepatellar bursitis occurs when the bursa, a fluid-filled sac, around the knee becomes inflamed and painful.

    Recovery depends on extent of inflammation.

    Rarity:
    Common
    Top Symptoms:
    pain in the front of the knee, swollen knee, knee redness
    Symptoms that always occur with prepatellar bursitis:
    pain in the front of the knee
    Urgency:
    Primary care doctor
  9. 9.Fibromyalgia

    Fibromyalgia is a disorder that causes widespread pain, tenderness, and fatigue.

    Fibromyalgia is generally a lifelong condition

    Rarity:
    Common
    Top Symptoms:
    fatigue, arthralgias or myalgias, anxiety, depressed mood, headache
    Symptoms that always occur with fibromyalgia:
    arthralgias or myalgias
    Urgency:
    Primary care doctor
  10. 10.Deep Vein Thrombosis

    Deep vein thrombosis (DVT) is a blood clot that forms in a vein deep in the body. Most deep vein clots occur in the lower leg or thigh.

    Curable with medication or surgery but may recur.

    Rarity:
    Uncommon
    Top Symptoms:
    fever, thigh pain, upper leg swelling, calf pain, butt pain
    Urgency:
    Hospital emergency room

Questions Your Doctor May Ask About Moderate Knee Pain

  • Q.Is the knee pain affecting one or both knees?
  • Q.Do you often feel your knees buckling?
  • Q.Where is your knee pain?
  • Q.Do you feel like your knee is unstable, weak, or giving out?

If you've answered yes to one or more of these questions, try our moderate knee pain symptom checker to find out more.

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Moderate Knee Pain Symptom Checker Statistics

  • People who have experienced moderate knee pain have also experienced:

    • 6% Lower Back Pain
    • 3% Knee Stiffness
    • 3% Knee That Clicks During Movement
  • People who have experienced moderate knee pain had symptoms persist for:

    • 40% Over a Month
    • 20% Less Than a Day
    • 19% Less Than a Week
  • People who have experienced moderate knee pain were most often matched with:

    • 60% Patellofemoral Pain Syndrome
    • 20% Infrapatellar Bursitis
    • 20% Knee Bursitis (Pes Anserine Bursitis)
  • Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

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