What is the primary symptom of contact dermatitis?

• A. Localized redness and inflammation
• B. Blisters and pus formation
• C. Papules and plaques
• D. Severe itching without visible irritation

Answer: (A)

Localized redness and inflammation is the primary symptom of contact dermatitis because this condition occurs when the skin comes into direct contact with an irritant or allergen, leading to an inflammatory response. The skin reacts to the offending substance, resulting in erythema (redness) and swelling as blood vessels dilate and fluids accumulate in the affected area. While blisters, pus formation, and other symptoms like severe itching can also occur depending on the severity and type of irritant or allergen involved, the hallmark of contact dermatitis typically begins with localized redness and inflammation. This initial response is crucial for identifying the condition and understanding its pathophysiology.