Read below about painful forearm lump, including causes and common questions. Or get a personalized analysis of your painful forearm lump 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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5 Potential Painful Forearm Lump 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.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:
    painful forearm lump, marble sized forearm lump, large forearm lump, pink or red forearm bump, yellow or white forearm bump
    Symptoms that never occur with skin abscess:
    fever
    Urgency:
    Primary care doctor
  2. 2.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 forearm bump, painful forearm lump, small forearm lump, marble sized forearm lump
    Symptoms that always occur with pimple:
    pink or red forearm bump
    Urgency:
    Self-treatment

    Painful Forearm Lump Checker

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  3. 3.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 forearm bump, painful forearm lump, small forearm lump, marble sized forearm lump
    Symptoms that always occur with boil (furuncle):
    pink or red forearm bump
    Symptoms that never occur with boil (furuncle):
    fever
    Urgency:
    Self-treatment
  4. 4.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, pink or red forearm bump, painful forearm lump, worsening forearm redness
    Symptoms that always occur with severe skin abscess:
    pink or red forearm bump, red bump
    Urgency:
    Hospital emergency room
  5. 5.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 forearm bump, small forearm lump, painful forearm lump, marble sized forearm lump, forearm itch
    Urgency:
    Wait and watch

Questions Your Doctor May Ask About Painful Forearm Lump

  • Q.What color is the bump?
  • Q.Any fever today or during the last week?
  • Q.About your [forearm], do you notice:
  • Q.Are you experiencing a headache?

If you've answered yes to one or more of these questions, try our painful forearm lump symptom checker to find out more.

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Painful Forearm Lump Symptom Checker Statistics

  • People who have experienced painful forearm lump have also experienced:

    • 13% Hard Forearm Lump
    • 9% Forearm Bump
    • 4% Skin - Colored Forearm Bump
  • People who have experienced painful forearm lump had symptoms persist for:

    • 35% Over a Month
    • 27% Less Than a Week
    • 15% Less Than a Day
  • People who have experienced painful forearm lump were most often matched with:

    • 51% Skin Abscess
    • 3% Pimple
  • 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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