Read below about red rash, including causes and common questions. Or get a personalized analysis of your red rash 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 Red Rash

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

  1. 1.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
  2. 2.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
  3. 3.Eczema (Atopic Dermatitis)

    Eczema is a form of skin inflammation that causes skin to be dry, itchy, red, and irritated.

    This is a long-term, recurring condition but symptoms are manageable with care.

    Rarity:
    Common
    Top Symptoms:
    trouble sleeping, feeling itchy or tingling all over, dry skin, scalp itchiness, flexor surface rash
    Symptoms that never occur with eczema (atopic dermatitis):
    fever
    Urgency:
    Phone call or in-person visit

    Red Rash Checker

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  4. 4.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
  5. 5.Allergic Reaction (Not Life - Threatening)

    When the body encounters a harmful substance, it responds with inflammation and swelling that can be protective. In many individuals, the body responds this way to substances that are not normally harmful, like foods or pollen. This is the basis of allergy, or Type 1 Hypersensitivity.

    Symptoms should resolve in a matter of hours.

    Rarity:
    Common
    Top Symptoms:
    swollen face, swollen lips, lip numbness, hives, red swollen bumps or patches with a pale center, lip redness
    Symptoms that never occur with allergic reaction (not life-threatening):
    shortness of breath, throat itching
    Urgency:
    Primary care doctor
  6. 6.Hives

    Urticaria are itchy, temporary rashes that rarely become swollen. It is often referred to as "hives."

    1-2 days

    Rarity:
    Common
    Top Symptoms:
    red or pink, rough patch of skin, itchy rash, curved rash, insect bite or sting, hives, red swollen bumps or patches with a pale center
    Symptoms that always occur with hives:
    red or pink, rough patch of skin
    Urgency:
    Self-treatment
  7. 7.Anaphylaxis

    Anaphylaxis is the sudden onset of breathing or heart rate changes that are caused by a whole-body allergic reaction. This can be a deadly situation.

    Indefinite

    Rarity:
    Rare
    Top Symptoms:
    nausea or vomiting, headache, stomach bloating, abdominal cramps (stomach cramps), being severely ill
    Urgency:
    Emergency medical service

Questions Your Doctor May Ask About Red Rash

  • Q.Any fever today or during the last week?
  • Q.What color is the skin change?
  • Q.Are there bumps on your rash?
  • Q.Did you possibly brush into poison ivy, poison oak, or poison sumac?

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

Red Rash Quiz

Red Rash Symptom Checker Statistics

  • People who have experienced red rash have also experienced:

    • 13% Warm and Red Rash
    • 12% Painful Rash
    • 4% Feeling Itchy or Tingling All Over
  • People who have experienced red rash had symptoms persist for:

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

    • 66% Eczema (Atopic Dermatitis)
    • 33% Non - Specific Dermatitis (Skin Inflammation)
  • 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

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Red Rash Quiz