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

Your Movable Knee Lump May Also be Known as:
Mobile bump in knee
Mobile lump in knee
Mobile mass in knee
Movable bump in knee
Movable lump in knee
Movable mass in knee

Top 3 Movable Knee Lump Causes

  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.

    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

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  2. 2.Dermatofibroma

    Dermatofibroma (superficial benign fibrous histiocytoma) is a common cutaneous nodule of unknown etiology that occurs more often in women. Dermatofibroma frequently develops on the extremities (mostly the lower legs) and is usually asymptomatic, although pruritus and tenderness can be present

    You do not need treatment for this condition because it is completely benign; however, if the lesion changes at all, a doctor should be consulted. If you would like it removed, a doctor can cut, freeze, or burn it off.

    Rarity:
    Rare
    Top Symptoms:
    knee itch, skin-colored knee bump, small knee lump, marble-size knee lump, pink or red knee bump
    Urgency:
    Wait and watch
  3. 3.Wart

    Warts are non-serious skin growths caused by a virus that infects the top layer of the skin. They are contagious.

    You can try several over-the-counter treatments, including salicylic acid and cryotherapy (freezing). Most warts go away on their own, but less so in adults.

    Rarity:
    Common
    Top Symptoms:
    skin-colored knee bump, painless lump in the knee, small knee lump, scaly knee bump
    Urgency:
    Self-treatment

Questions Your Doctor May Ask About Movable Knee Lump

  • Q.How severe is your knee pain?
  • Q.Is your knee pain getting better or worse?
  • Q.While you are standing, take a look at your knees. Do they appear to bend towards each other, rather than follow a straight line along your legs? (Knock-kneed)
  • Q.Have you been around anyone with the same symptoms, possibly exposing yourself to an infection?

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

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Try our movable knee lump symptom checker to diagnose your current condition

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