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

A.I. Health Assistant

Take a quiz to find out why you’re having itchy rash

Itchy Rash Quiz

A.I. Health Assistant Causes for Itchy Rash

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

  1. 1.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
  2. 2.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
  3. 3.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
  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.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

    Itchy Rash Checker

    Take a quiz to find out why you’re having itchy rash.

    Itchy Rash Quiz
  6. 6.Pityriasis Rosea

    Pityriasis rosea is a common skin condition with no known cause. It is not contagious and does not usually lead to any dangerous complications. It most often appears as a larger "mother" patch which comes first, surrounded by smaller "daughter" patches which appear soon after.

    Pityriasis Rosea will go away on its own within 2-8 weeks

    Rarity:
    Rare
    Top Symptoms:
    rash, itchy rash, curved rash, rough patch with red spots around it
    Symptoms that always occur with pityriasis rosea:
    rash
    Symptoms that never occur with pityriasis rosea:
    blue-colored skin changes, black-colored skin changes, brown-colored skin changes
    Urgency:
    Self-treatment
  7. 7.Allergic Reaction to Poison Ivy / Oak / Sumac

    Plants of the Toxicodendron genus are found throughout the continental United States, and exposure to these plants is a leading cause of contact dermititis, a medical term used to describe irritation and itching of the skin.

    With treatment, symptoms should resolve from a few days to two weeks.

    Rarity:
    Common
    Top Symptoms:
    rash, itchy rash, red rash, skin changes on arm, stinging or burning rash
    Symptoms that always occur with allergic reaction to poison ivy/oak/sumac:
    itchy rash, rash
    Symptoms that never occur with allergic reaction to poison ivy/oak/sumac:
    fever
    Urgency:
    Self-treatment
  8. 8.Psoriasis

    Psoriasis is a skin disease that causes itchy or sore patches of thick, red skin with silvery scales. The patches mostly affect the elbows, knees, scalp, back, face, palms and feet.

    Psoriasis is a chronic condition. Often flare-ups come and go. In some cases, psoriasis goes away over time.

    Rarity:
    Uncommon
    Top Symptoms:
    itchy rash, red or pink, rough patch of skin, rash with well-defined border, painful rash, scaly rash
    Symptoms that never occur with psoriasis:
    fever, black-colored skin changes, brown-colored skin changes, blue-colored skin changes
    Urgency:
    Primary care doctor
  9. 9.Non - Specific Insect Bite

    Insect bites are very common. The saliva given off during the bit can sometimes cause dangerous allergic reactions that affect your ability to breathe. However, the vast majority of insect bites have no adverse effects besides the inflammation where the bite occurred.

    1 week

    Rarity:
    Common
    Urgency:
    Self-treatment
  10. 10.Mosquito Bite

    Mosquito bites are very common. They often cause itchiness and redness.

    Usually clears up within a week.

    Rarity:
    Common
    Top Symptoms:
    mosquito bite
    Symptoms that always occur with mosquito bite:
    mosquito bite
    Symptoms that never occur with mosquito bite:
    fever, muscle aches, vomiting, loss of appetite
    Urgency:
    Self-treatment

Questions Your Doctor May Ask About Itchy Rash

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

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

Itchy Rash Quiz

Itchy Rash Symptom Checker Statistics

  • People who have experienced itchy rash have also experienced:

    • 5% Feeling Itchy or Tingling All Over
    • 4% Vaginal Itch or Burning
    • 4% Leg Skin Changes
  • People who have experienced itchy rash had symptoms persist for:

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

    • 50% Non - Specific Dermatitis (Skin Inflammation)
    • 50% Hives
  • 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 itchy rash

Itchy Rash Quiz