### Causes, Symptoms, and Differences Between Allergic and Irritant Contact Dermatitis **Allergic Contact Dermatitis** occurs when your skin reacts to an allergen, leading to an immune response. Common allergens include metals, rubber, and certain skincare products. Symptoms may appear 12 to 72 hours after exposure and include red, itchy skin that can last for 2 to 4 weeks. **Irritant Contact Dermatitis** is caused by direct damage to the skin from irritants like detergents, chemicals, or even soap. Unlike allergic contact dermatitis, it does not involve an immune response and symptoms appear more quickly. ### Diagnosis To diagnose allergic contact dermatitis, a doctor may refer you to an allergy specialist for patch testing. This involves applying small amounts of potential allergens to your skin and observing the reaction over a week. ### Treatment - **Mild Reactions:** Over-the-counter creams and antihistamines. - **Severe Reactions:** Prescription medications and possibly antibiotics if an infection occurs. - **General Tips:** Avoid scratching to prevent infection and identify and avoid the allergen. ### Prevention - **Avoid Known Allergens:** Read labels carefully on skincare products and household cleaners. - **Immediate Action:** Wash the affected area with soap and lukewarm water if you suspect exposure. - **Cool Compresses:** Apply to soothe itching and irritation. ### Conclusion Avoiding the allergen is the best way to prevent allergic contact dermatitis. If symptoms are severe, consult your doctor.