Read below about pink or red knee bump, including causes and common questions. Or get a personalized analysis of your pink or red 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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6 Potential Pink or Red 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.Pimple

    Acne, also known as pimples, occurs when hair follicles become clogged with oil & dead skin cells. Acne is extremely common and ranges from mild to severe.

    The severity of the acne dictates treatment-type and duration. With proper treatment, acne should resolve in weeks to months. In some cases, acne is a long-term condition.

    Rarity:
    Common
    Top Symptoms:
    pink or red knee bump, painful knee lump, marble-size knee lump, small knee lump
    Symptoms that always occur with pimple:
    pink or red knee bump
    Urgency:
    Self-treatment
  2. 2.Skin Abscess

    A skin abscess is an infection of the deeper skin that's typically due to bacteria seen on the skin. Recently, infections are more frequently caused by Staph. Aureus (puts the "staph" in "staph infections").

    Good prognosis with treatment

    Rarity:
    Common
    Top Symptoms:
    large knee lump, painful knee lump, marble-size knee lump, pink or red knee bump, yellow or white knee bump
    Symptoms that never occur with skin abscess:
    fever
    Urgency:
    Primary care doctor
  3. 3.Severe Skin Abscess

    A skin abscess is an infection of the deeper skin that's typically due to bacteria seen on the skin. Recently, infections are more frequently caused by Staph. Aureus (puts the "staph" in "staph infections"). If the infection begins to spread, urgent treatment is required.

    92-96% resolve with treatment within 7-10 days

    Rarity:
    Rare
    Top Symptoms:
    fatigue, fever, painful knee lump, pink or red knee bump, large knee lump
    Symptoms that always occur with severe skin abscess:
    pink or red knee bump, red bump
    Urgency:
    Hospital emergency room

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  4. 4.Boil (Furuncle)

    Boils are infections of a hair follicle that creates a small pocket of inflammation full of pus. It's typically caused by a common bacteria called S. Aureus.

    5-10 days

    Rarity:
    Uncommon
    Top Symptoms:
    pink or red knee bump, painful knee lump, marble-size knee lump, small knee lump
    Symptoms that always occur with boil (furuncle):
    pink or red knee bump
    Symptoms that never occur with boil (furuncle):
    fever
    Urgency:
    Self-treatment
  5. 5.Basal Cell Carcinoma

    Basal cell carcinoma is a slow-growing form of skin cancer. Skin cancer falls into two major groups: Non-melanoma and melanoma. Basal cell carcinoma is a type of non-melanoma skin cancer.

    Indefinite

    Rarity:
    Uncommon
    Top Symptoms:
    skin-colored knee bump, painless lump in the knee, growing knee bump, marble-size knee lump, small knee lump
    Urgency:
    Primary care doctor
  6. 6.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 Pink or Red Knee Bump

  • Q.Do you feel pain when you touch the bump?
  • Q.Is your bump getting bigger?
  • Q.Any fever today or during the last week?
  • Q.What is your body mass?

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

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Pink or Red Knee Bump Symptom Checker Statistics

  • People who have experienced pink or red knee bump have also experienced:

    • 15% Knee Pain
    • 13% Knee Bump
    • 10% Knee Skin Changes
  • People who have experienced pink or red knee bump had symptoms persist for:

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

    • 44% Pimple
    • 39% Skin Abscess
    • 1% Severe Skin Abscess
  • 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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