Read below about black or brown leg bump, including causes and common questions. Or get a personalized analysis of your black or brown leg 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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A.I. Health Assistant Causes for Black or Brown Leg Bump

Updated on Aug. 29, 2018

The list below shows results from the use of our A.I. Health Assistant by Buoy users who experienced black or brown leg bump. This list does not constitute medical advice.

  1. 1.Wart

    Warts are non-serious skin growths caused by a virus that infects the top layer of the skin. They are contagious. Thus, warts on the face are often spread there by the hands, and vice versa.

    78% go away in 2 years

    Rarity:
    Common
    Top Symptoms:
    small facial lump, painless facial bump, skin-colored facial bump, scaly facial bump
    Symptoms that never occur with wart:
    headache
    Urgency:
    Self-treatment
  2. 2.Mole on the Lower Leg

    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 lower leg bump, black or brown leg bump, small lower leg lump, bump's smooth border, uniformly black/brown lower leg bump
    Symptoms that always occur with mole on the lower leg:
    unchanged lower leg bump, black or brown leg bump
    Urgency:
    Wait and watch
  3. 3.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 facial lump, black or brown facial bump
    Symptoms that always occur with blackhead:
    small facial lump, black or brown facial bump
    Urgency:
    Self-treatment

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  4. 4.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:
    small facial lump, pink or red facial bump, face itch, skin-colored facial bump, painful facial bump
    Urgency:
    Wait and watch
  5. 5.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
  6. 6.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
  7. 7.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

Questions Your Doctor May Ask About Black or Brown Leg Bump

  • Q.Is the border of the bump round or are there jagged edges?
  • Q.Is the bump a single shade of black/brown or a mix?
  • Q.Is your lower leg bump painful to touch?
  • Q.Any fever today or during the last week?

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

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Black or Brown Leg Bump Symptom Checker Statistics

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

    • 10% Lower Leg Pain
    • 8% Upper Leg Bump
    • 6% Lower Leg Bump
  • People who have experienced black or brown leg bump had symptoms persist for:

    • 39% Over a Month
    • 22% Less Than a Week
    • 14% Less Than a Day
  • People who have experienced black or brown leg bump were most often matched with:

    • 50% Wart
    • 50% 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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