Read below about painless armpit lump, including causes and common questions. Or get a personalized analysis of your painless armpit 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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A.I. Health Assistant Causes for Painless Armpit Lump

The list below shows results from the use of our A.I. Health Assistant by Buoy users who experienced painless armpit lump. This list does not constitute medical advice.

  1. 1.Skin Cyst

    An epidermoid cyst is a closed sac under the skin filled with a cheese-like or oily material. It is caused by trauma or surgery.

    Resolves with treatment

    Rarity:
    Common
    Top Symptoms:
    skin-colored armpit bump, marble sized armpit lump, small armpit lump
    Symptoms that always occur with skin cyst:
    skin-colored armpit bump
    Urgency:
    Wait and watch
  2. 2.Lipoma

    A lipoma is a noncancerous growth of fatty tissue cells. A lipoma can develop in almost any organ of the body although they are most commonly found in the subcutaneous layer just below the skin.

    Resolves with treatment

    Rarity:
    Uncommon
    Top Symptoms:
    skin-colored groin bump, marble sized groin lump, small groin lump
    Symptoms that always occur with lipoma:
    skin-colored groin bump
    Urgency:
    Wait and watch
  3. 3.Enlarged Lymph Nodes in the Armpit

    Enlarged lymph nodes occur when the node becomes larger as it fills with inflammatory cells. This often is a result of an infection but can occur without a known cause.

    Enlarged lymph nodes should go away within a week or two.

    Rarity:
    Common
    Top Symptoms:
    armpit lump, movable armpit lump
    Symptoms that always occur with enlarged lymph nodes in the armpit:
    armpit lump
    Symptoms that never occur with enlarged lymph nodes in the armpit:
    fever, unintentional weight loss, hard lump in the armpit
    Urgency:
    Phone call or in-person visit
  4. 4.Folliculitis

    Folliculitis is a common skin problem where hair follicles are infected by bacteria or fungi.

    Mild cases clear in a few days. More severe ones can cause hair loss and scarring.

    Rarity:
    Common
    Top Symptoms:
    small facial lump, pink or red facial bump, face itch, facial bump leaking yellow/milky fluid, yellow or white facial bump
    Symptoms that always occur with folliculitis:
    small facial lump
    Urgency:
    Self-treatment

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  5. 5.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 facial bump, small facial lump, painful facial bump, marble sized facial lump, constant skin changes
    Symptoms that always occur with boil (furuncle):
    pink or red facial bump
    Symptoms that never occur with boil (furuncle):
    fever
    Urgency:
    Self-treatment
  6. 6.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 facial bump, small facial lump, painful facial bump, marble sized facial lump
    Symptoms that always occur with pimple:
    pink or red facial bump
    Urgency:
    Self-treatment
  7. 7.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"), which is dangerous and requires treatment.

    Good prognosis with treatment

    Rarity:
    Common
    Top Symptoms:
    rash with bumps or blisters, red rash, red skin bump larger than 1/2 cm in diameter, pus-filled rash, rash
    Symptoms that always occur with skin abscess:
    rash with bumps or blisters
    Urgency:
    Primary care doctor
  8. 8.Allergic Contact Dermatitis of the Armpit

    Allergic contact dermatitis is a condition in which the skin becomes irritated and inflamed following physical contact with an allergen. Common products known to cause allergic dermatitis include plants, metals, soap, fragrance, and cosmetics.

    1-2 days

    Rarity:
    Common
    Top Symptoms:
    armpit redness, armpit itch, scabbed armpit bump
    Symptoms that always occur with allergic contact dermatitis of the armpit:
    armpit redness
    Urgency:
    Self-treatment
  9. 9.Hodgkin's Lymphoma

    Hodgkin lymphoma is a cancer of the lymphatic system, which is part of the immune system. Cells in the lymph nodes grow abnormally and may spread beyond the lymphatic system.

    Curable but survival rates are variable

    Rarity:
    Rare
    Top Symptoms:
    fatigue, loss of appetite, abdominal pain (stomach ache), shortness of breath, fever
    Symptoms that never occur with hodgkin's lymphoma:
    pulsing armpit mass, armpit lump that comes and goes, shrinking armpit lump, pink or red armpit bump, black or brown armpit bump, yellow or white armpit bump, bleeding armpit bump, armpit bump leaking yellow or milky fluid, armpit bump leaking clear fluid, scabbed armpit bump, scaly armpit bump, neck lump that comes and goes, shrinking neck bump, pink or red neck bump, black or brown neck bump, yellow or white neck bump, bleeding bump, bump leaking clear fluid, neck bump leaking yellow/milky fluid, scabbed bump, scaly neck bump, pulsing chest mass, chest lump that comes and goes, shrinking chest bump, pink or red chest bump, black or brown mass on chest, yellow or white chest bump, blue bump on the chest, bleeding chest bump, chest bump leaking clear fluid, chest bump leaking yellow/milky fluid, scabbed chest bump, scaly chest bump, pulsing groin mass, groin lump that comes and goes, shrinking groin lump, pink or red groin bump, black or brown groin bump, yellow or white groin bump, inflamed groin bump, scaly groin bump, bleeding groin bump, groin bump producing clear fluid, groin bump producing yellow or milky fluid
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Painless Armpit Lump

  • Q.What color is the bump?
  • Q.Any fever today or during the last week?
  • Q.Do you have a rash?
  • Q.Are you experiencing a headache?

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

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Painless Armpit Lump Symptom Checker Statistics

  • People who have experienced painless armpit lump have also experienced:

    • 9% Hard Lump in the Armpit
    • 7% Fatigue
    • 4% Armpit Lump
  • People who have experienced painless armpit lump had symptoms persist for:

    • 43% Less Than a Week
    • 21% Over a Month
    • 13% Less Than a Day
  • People who have experienced painless armpit lump were most often matched with:

    • 100% Enlarged Lymph Nodes in the Armpit
  • 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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