There are two main types of contact dermatitis. Irritant contact dermatitis is caused by direct chemical damage to the skin from substances like soaps, solvents, or repeated water exposure. Allergic contact dermatitis is a delayed hypersensitivity reaction (Type IV immune response) to specific allergens such as nickel, fragrances, preservatives, rubber chemicals, or hair dye components. Allergic contact dermatitis can take 24–72 hours to develop after exposure.
Common Signs & Symptoms
- Red, inflamed, itchy skin in areas of contact
- Blistering or oozing in acute reactions
- Dry, scaly, or thickened skin in chronic cases
- Burning or stinging sensation
- Rash on the hands, face, neck, or other exposed areas
- Symptoms that persist despite standard eczema treatments
How We Diagnose
Diagnosis relies on a detailed history of occupation, hobbies, cosmetics, jewelry, and household product use, combined with patch testing — a specialized procedure in which standardized panels of contact allergens are applied to the back under occlusion for 48 hours and evaluated at 48 and 72 hours for allergic responses. Our team performs comprehensive patch testing using the North American standard series and additional supplemental panels.
Treatment Options
Once the causative allergen is identified, avoidance is the cornerstone of treatment. Our allergists provide a detailed allergen avoidance guide, product substitution recommendations, guidance on occupational exposures, topical and systemic treatments to resolve the current rash, and barrier repair strategies to protect the skin from future exposure.
Ready to Schedule?
Stop guessing what is causing your skin reaction. Schedule a contact dermatitis evaluation with South Bay Allergy and Asthma Group today. Call us at (408) 286-1707 or request an appointment online.