How do I know what rash I have?

A quiz can narrow it down. An AI analysis on three real photos can go further.

Skip the quiz — get an actual analysis

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

Allergic reactions (food, medication, contact)
Eczema, psoriasis, rosacea
Fungal, bacterial, or viral infections
Heat-, sweat-, or friction-induced rashes
Insect bites and stings
Autoimmune conditions (lupus, dermatomyositis)

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.

Where is it located?

Localised rashes (one body part) often point to contact dermatitis or local infection. Widespread rashes can suggest viral, drug, or autoimmune causes.

Is it itchy, painful, or numb?

Itchy: allergic, eczema, hives. Painful: shingles, cellulitis. Numb: rare, but can suggest neurological involvement.

Came on suddenly or built up gradually?

Sudden hives often = allergy. Gradual scaly patches often = eczema/psoriasis. Sudden painful one-sided rash = consider shingles.

Any other symptoms (fever, fatigue, joint pain)?

Whole-body symptoms with a rash deserve a doctor's visit — they can signal infection, drug reaction, or autoimmune disease.

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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