What is a common symptom of allergic contact dermatitis?

A common symptom of allergic contact dermatitis is characterized by redness, itching, and swelling at the contact point. This condition occurs when the skin reacts to an allergen that has touched it, typically manifesting in a localized area where the substance has made contact. The immune response triggered by this allergen results in inflammation, leading to the visible symptoms of redness and swelling, as well as the sensation of itching, which can often be quite intense.

The other options, while they describe skin conditions, do not specifically relate to allergic contact dermatitis. For instance, dry patches of skin may indicate other conditions such as eczema or psoriasis, and excessive oil production is related to conditions like acne or seborrheic dermatitis. Hair loss is associated with a variety of factors, including hormonal imbalances or medical conditions, rather than being a direct symptom of allergic contact dermatitis. Thus, the specific combination of redness, itching, and swelling at the contact point distinctly identifies the condition and aligns with the body’s immune response to allergens.