Read below about knee skin changes, including causes and common questions. Or get a personalized analysis of your knee skin changes 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 Knee Skin Changes

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

  1. 1.Irritant Contact Dermatitis

    Contact dermatitis is a condition in which the skin becomes red, sore, or inflamed after direct contact with a substance. This condition most often affects skin of the hands, and may occur after repeated and prolonged exposure to substances such as water, detergents (soaps, bleach), solvents (such as gasoline), acids, powders, dust, and soil. The onset of the skin reaction is usually within 48 hours of coming in contact with the substance.

    1-2 days.

    Rarity:
    Common
    Top Symptoms:
    rash with well-defined border, itchy rash, red or pink, rough patch of skin, painful rash, red rash
    Symptoms that always occur with irritant contact dermatitis:
    rash with well-defined border
    Symptoms that never occur with irritant contact dermatitis:
    fever, black-colored skin changes, brown-colored skin changes, blue-colored skin changes
    Urgency:
    Self-treatment
  2. 2.Allergic Contact Dermatitis of the Lower Leg

    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:
    lower leg redness, lower leg itch, scabbed area of the lower leg
    Symptoms that always occur with allergic contact dermatitis of the lower leg:
    lower leg redness
    Urgency:
    Self-treatment
  3. 3.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
  4. 4.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
  5. 5.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

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  6. 6.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
  7. 7.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:
    severe abdominal lump, brown-colored skin changes, moderate abdominal lump, atypical abdominal bump features, growing abdominal bump
    Symptoms that always occur with atypical mole:
    black or brown abdominal bump, atypical abdominal bump features
    Urgency:
    Primary care doctor
  8. 8.Non - Specific Dermatitis (Skin Inflammation)

    Dermatitis is the inflammation ("-itis") of the skin ("derma" is a layer of the skin). It can be caused by any number of causes, from allergies to infections to autoimmune issues. Dermatitis of Normal Variation (also called, "NOS") means that all of those other causes of your rash have been ruled out. This is very common.

    1-2 days

    Rarity:
    Common
    Top Symptoms:
    red rash, itchy rash, painful rash
    Symptoms that always occur with non-specific dermatitis (skin inflammation):
    red rash
    Urgency:
    Self-treatment
  9. 9.Non - Specific Skin Rash

    A rash is an area of irritated or swollen skin. Often, rashes are unidentifiable and some variation of normal. For example, scratching one's arm causes it to turn red (which is caused by mast cells releasing chemicals into the local area), but that's completely normal.

    1-2 days

    Rarity:
    Common
    Top Symptoms:
    rash
    Symptoms that always occur with non-specific skin rash:
    rash
    Urgency:
    Wait and watch
  10. 10.Solar (Actinic) Keratosis

    Actinic keratosis, also known as solar keratosis, is the most common skin condition caused by sun damage over many years. It appears as small, rough, raised growths that may be hard and warty.

    May go away on its own within a year. Use sunscreen to prevent these if you spend a lot of time outside.

    Rarity:
    Common
    Top Symptoms:
    unchanged face redness, rough skin on the face, thickened skin with a well-defined border
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Knee Skin Changes

  • Q.Any fever today or during the last week?
  • Q.Are there bumps on your rash?
  • Q.What color is the skin change?
  • Q.Is your rash raised or rough when you run your hand over the area of skin?

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

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Knee Skin Changes Symptom Checker Statistics

  • People who have experienced knee skin changes have also experienced:

    • 19% Knee Bump
    • 12% Knee Itch
    • 8% Knee Pain
  • People who have experienced knee skin changes had symptoms persist for:

    • 29% Over a Month
    • 27% Less Than a Week
    • 25% Less Than a Day
  • People who have experienced knee skin changes were most often matched with:

    • 50% Irritant Contact Dermatitis
    • 50% Allergic Contact Dermatitis of the Lower Leg
  • Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

A.I. Health Assistant

Take a quiz to find out why you’re having knee skin changes

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