Read below about black or brown armpit bump, including causes and common questions. Or get a personalized analysis of your black or brown armpit 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 Armpit 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 armpit lump, black or brown armpit bump
    Symptoms that always occur with blackhead:
    small armpit lump, black or brown armpit bump
    Urgency:
    Self-treatment

    Black or Brown Armpit Bump Checker

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  2. 2.Atypical Mole

    Moles are growths on the skin. They happen when pigment cells in the skin, called melanocytes, grow in clusters. Certain moles are considered "atypical" because of their size and characteristics, which require careful watching and possibly even biopsy in order to monitor for development into cancer.

    Indefinite

    Rarity:
    Uncommon
    Top Symptoms:
    marble sized armpit lump, black or brown armpit bump, growing armpit lump, small armpit lump, large armpit lump
    Symptoms that always occur with atypical mole:
    black or brown armpit bump
    Urgency:
    Primary care doctor
  3. 3.Mole in the Armpit

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

    Indefinite

    Rarity:
    Uncommon
    Top Symptoms:
    constant armpit lump, black or brown armpit bump, small armpit lump, black or brown armpit bump with smooth border, uniformly black or brown armpit bump
    Symptoms that always occur with mole in the armpit:
    constant armpit lump, black or brown armpit bump
    Urgency:
    Wait and watch

Questions Your Doctor May Ask About Black or Brown Armpit Bump

  • Q.Any fever today or during the last week?
  • Q.Is the border of the bump round or are there jagged edges?
  • Q.Is the bump a single shade of black or brown or a mix?
  • Q.Do you have a rash?

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

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Black or Brown Armpit Bump Symptom Checker Statistics

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

    • 23% Painful Armpit Lump
    • 4% Catatonia
    • 4% Skin Changes on Armpit
  • People who have experienced black or brown armpit bump had symptoms persist for:

    • 43% Less Than a Week
    • 22% Over a Month
    • 13% Less Than a Day
  • People who have experienced black or brown armpit bump were most often matched with:

    • 42% Atypical Mole
    • 34% Mole in the Armpit
    • 12% Blackhead
  • 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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