### How is Atopic Dermatitis (Eczema) Diagnosed? Diagnosing atopic dermatitis, the most common type of eczema, involves a thorough examination by a dermatologist. Here’s what you can expect during the diagnostic process: 1. **Medical History**: Your dermatologist will ask about your health history and whether any family members have skin conditions. Atopic dermatitis often runs in families. 2. **Symptom Discussion**: You’ll discuss when your symptoms began. Atopic dermatitis can start at any age, though it often begins in childhood. 3. **Skin Examination**: The dermatologist will examine the affected areas of your skin. Most cases can be diagnosed with just a medical history and skin exam. 4. **Additional Tests**: Sometimes, further tests are needed to confirm the diagnosis or rule out other conditions. These may include: - **Patch Testing**: Identifies allergens that may trigger symptoms. Small amounts of potential allergens are placed on your skin to see if they cause a reaction. - **Biopsy**: A small skin sample is taken and examined under a microscope to confirm the diagnosis and rule out other conditions. By combining your medical history, family history, and a skin exam, most cases of atopic dermatitis can be accurately diagnosed. Occasionally, additional tests like patch testing or a biopsy are necessary.