How is ACD hx and presentation?

ACD usually leads to erythema and scaling with visible borders. ➢ Itching and discomfort may also occur. ➢ Acute cases may involve a dramatic flare with erythema, vesicles, and bullae; chronic cases may involve lichen with cracks and fissures. ➢ Only history and questioning can determine whether the materials to which a patient is allergic are partly or wholly responsible for the current dermatitis. ➢ When a possible causative substance is known, the first step in confirming the diagnosis is determining whether the problem resolves with avoidance of the substance