Read below about black or brown knee bump, including causes and common questions. Or get a personalized analysis of your black or brown knee bump 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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3 Potential Black or Brown Knee Bump 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.Blackhead

    Blackheads are caused by hair follicles becoming clogged with oil & dead skin cells. When the clogged pore is open to the air, the air turns the outermost layer black through oxidation.

    Blackheads should go away within the next 3-4 days

    Rarity:
    Common
    Top Symptoms:
    small knee lump, black or brown knee bump
    Symptoms that always occur with blackhead:
    small knee lump, black or brown knee bump
    Urgency:
    Self-treatment

    Black or Brown Knee Bump Checker

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  2. 2.Mole on the Knee

    Moles are growths on the skin. They happen when pigment cells in the skin, called melanocytes, grow in clusters.

    Indefinite

    Rarity:
    Uncommon
    Top Symptoms:
    unchanged knee bump, black or brown knee bump, small knee lump, bump's smooth border, uniformly black/brown knee bump
    Symptoms that always occur with mole on the knee:
    unchanged knee bump, black or brown knee bump
    Urgency:
    Wait and watch
  3. 3.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

    Resolves with treatment

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

Questions Your Doctor May Ask About Black or Brown Knee Bump

  • Q.Is your bump getting bigger?
  • Q.Do you feel pain when you touch the bump?
  • Q.Is the border of the bump round or are there jagged edges?
  • Q.Is the bump one single shade of black/brown or a mix?

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

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Black or Brown Knee Bump Symptom Checker Statistics

  • People who have experienced black or brown knee bump have also experienced:

    • 16% Knee Redness
    • 16% Pain in the Lower Left Abdomen
    • 16% Pain in the Outside of the Knee
  • People who have experienced black or brown knee bump had symptoms persist for:

    • 39% Over a Month
    • 26% Less Than a Week
    • 15% Less Than a Day
  • People who have experienced black or brown knee bump were most often matched with:

    • 50% Mole on the Knee
    • 15% Blackhead
    • 6% Dermatofibroma
  • 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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