Read below about rash on one lower leg, including causes and common questions. Or get a personalized analysis of your rash on one lower leg 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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10 Potential Rash on One Lower Leg 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.Ringworm (Tinea Corporis)

    Tinea Corporis is a common fungal infection of the skin. This rash is sometimes called "ringworm" and results in ring-shaped redness that is often itchy.

    With treatment, the rash should resolve within 2-3 weeks

    Rarity:
    Common
    Top Symptoms:
    dry skin, rash, red rash, itchy rash, curved rash
    Symptoms that never occur with ringworm (tinea corporis):
    groin skin changes, fever, scrotal itch, groin itch, facial skin changes, hand skin changes, genital skin changes
    Urgency:
    Self-treatment
  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.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
  4. 4.Benign Skin Growth

    Seborrheic keratosis is a condition that causes wart-like growths on the skin. The growths are benign (not-cancerous) and look like stuck-on plaques.

    Resolves with treatment

    Rarity:
    Common
    Top Symptoms:
    constant skin changes, itchy rash, rash with well-defined border, abdominal skin changes, neck skin changes
    Symptoms that always occur with benign skin growth:
    constant skin changes
    Symptoms that never occur with benign skin growth:
    cherry red lower leg bump
    Urgency:
    Wait and watch
  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

    Rash on One Lower Leg Checker

    Take a quiz to find out why you’re having rash on one lower leg.

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  6. 6.Molluscum Contagiosum

    Molluscum Contagiosum is a common viral infection of the skin that usually affects young children, sexually active young adults, and patients with a weakened immune system.

    Typically resolves in 6-9 months

    Rarity:
    Common
    Top Symptoms:
    rash with bumps or blisters, leg skin changes, skin changes on arm, head or neck skin changes, genital skin changes
    Symptoms that never occur with molluscum contagiosum:
    fever, headache
    Urgency:
    Phone call or in-person visit
  7. 7.Wart

    Warts are non-serious skin growths caused by a virus that infects the top layer of the skin. They are contagious.

    78% go away in 2 years

    Rarity:
    Common
    Top Symptoms:
    skin-colored ear bump, mild ear lump, non-tender ear bump, scaly ear bump
    Urgency:
    Self-treatment
  8. 8.Type 2 Diabetes

    Diabetes causes that blood glucose (blood sugar) levels to become high. With Type II Diabetes, the more common type, the body does not make or use insulin efficiently. Insulin is necessary to metabolize glucose.

    Type II Diabetes is a life-long condition but can be well managed.

    Rarity:
    Common
    Top Symptoms:
    fatigue, increased appetite compared to normal, vision changes, feeling itchy or tingling all over, excesive thirst
    Urgency:
    Primary care doctor
  9. 9.Chronic Hepatitis c

    Hepatitis C is an infection of the liver by the hepatitis C virus (HCV) that is carried in human blood. It spreads through contact with infected blood, such as through infected needles, toothbrushes, or razors, through unprotected sex with an infected person, and from mother to baby during childbirth.

    Hepatitis C is a chronic infection and without treatment the effect on life expectancy is difficult to predict.

    Rarity:
    Common
    Top Symptoms:
    fatigue, nausea, muscle aches, loss of appetite, joint pain
    Symptoms that never occur with chronic hepatitis c:
    pain in the lower right abdomen, pain in the lower left abdomen, pain in the upper left abdomen, pain around the belly button
    Urgency:
    Primary care doctor
  10. 10.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:
    atypical features of an ear bump, growing ear bump, mild ear lump, moderate ear lump, severe ear lump
    Symptoms that always occur with atypical mole:
    atypical features of an ear bump
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Rash on One Lower Leg

  • Q.Any fever today or during the last week?
  • Q.What color is the skin change?
  • Q.Is your rash:
  • Q.Are there bumps on your rash?

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

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Rash on One Lower Leg Symptom Checker Statistics

  • People who have experienced rash on one lower leg have also experienced:

    • 12% Leg Skin Changes
    • 8% Itchy Rash
    • 5% Shin Itch
  • People who have experienced rash on one lower leg had symptoms persist for:

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

    • 28% Non - Specific Dermatitis (Skin Inflammation)
    • 22% Non - Specific Skin Rash
    • 7% Ringworm (Tinea Corporis)
  • 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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