What rash do I have on my arm?

Common arm-rash causes, quick symptom checks, and a fast way to get a real AI analysis.

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Quizzes can suggest possibilities but they can't see your skin. Rash Detector analyzes three real photos and returns a detailed AI report — detected abnormalities, condition information, risk assessment, and a clear summary — in about a minute.

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Common causes of arm rashes

Contact dermatitis (jewelry, soap, plants)
Eczema (atopic dermatitis) — typically inside elbows
Psoriasis — outside of elbows is common
Heat rash from sweat or friction
Insect bites or hives
Fungal infections like ringworm

Quick symptom checks

These checks can help you narrow down what you might be dealing with — but they are not a diagnosis. Run a Rash Detector report for a structured AI analysis, and consult a healthcare professional for diagnosis and treatment.

Rash exactly where a watch, bracelet, or sleeve sits?

Likely contact dermatitis from metal, fabric dye, or fragrance.

Patchy, dry rash on the inside of the elbow?

Classic eczema pattern. Moisturize and avoid known triggers.

Thick scaly plaques on the outside of the elbows?

Likely psoriasis. A dermatologist can confirm and treat.

Cluster of small bumps after gardening or hiking?

Could be plant-induced contact dermatitis (poison ivy, oak, sumac) or insect bites.

When to see a doctor

Seek medical attention if your rash is spreading rapidly, becoming painful, accompanied by fever, draining pus, or accompanied by difficulty breathing. Rash Detector is an awareness tool, not a diagnostic device.

Three photos. One report. About a minute.

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