Read below about bent-in knees, including causes and common questions. Or get a personalized analysis of your bent-in knees 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.

This symptom can also be referred to as:
Knees curve in
Knock knees

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5 Potential Bent - in Knees Causes

Disclaimer: The article does not replace an evaluation by a physician. Information on this page is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes.

  1. 1.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
  2. 2.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

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  3. 3.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.

    Recovery timeline is dependent on treatment type.

    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
  4. 4.Rickets

    Rickets causes soft, weak bones in children. It usually occurs when they do not get enough vitamin D, which helps growing bones absorb the minerals calcium and phosphorous.

    Indefinite

    Rarity:
    Rare
    Top Symptoms:
    muscle aches, irritability, fatigue, spontaneous bone pain, patchy hair loss
    Urgency:
    Primary care doctor
  5. 5.Osgood - Schlatter Disease

    This condition is a common cause of knee pain amount children and adolescents who play sports, and usually affects children 16 and younger. Osgood-Schlatter Disease usually develops due to overuse of the large quadriceps (quad) muscle which makes up the front of the thigh. The muscle pulls on the kneecap and the kneecap (patellar) ligament, which attaches to the upper part of the shin bone (tibia). With overuse, redness and soreness may develop in the knee.

    Pain typically only lasts a few weeks or months.

    Rarity:
    Rare
    Top Symptoms:
    knee pain, knee pain that gets worse when squatting, pain in one knee, knee pain that gets worse when kneeling, knee pain that gets worse during a run
    Symptoms that always occur with osgood-schlatter disease:
    knee pain
    Urgency:
    Self-treatment

Questions Your Doctor May Ask About Bent - in Knees

  • Q.Did you feel your knee cap pop out of place?
  • Q.Are you feeling less alert than normal?
  • Q.How would you explain the cause of your knee pain?
  • Q.Where is your knee pain?

If you've answered yes to one or more of these questions, try our bent-in knees symptom checker to find out more.

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Bent - in Knees Symptom Checker Statistics

  • People who have experienced bent-in knees have also experienced:

    • 12% Foot Pain
    • 6% Tooth Falling Out
    • 6% Burning Chest Pain
  • People who have experienced bent-in knees were most often matched with:

    • 22% Patellofemoral Pain Syndrome
    • 22% Knee Bursitis (Pes Anserine Bursitis)
    • 11% Repeated Kneecap Dislocation (Patellar Subluxation)
  • 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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