Contact Dermatitis Diagnosis and Treatment

Clinical Presentation and Diagnosis

Irritant contact dermatitis occurs immediately after exposure in all individuals in a dose-dependent manner, caused by direct chemical damage from acids, alkalis, or strong cleaning agents, according to the American Academy of Otolaryngology-Head and Neck Surgery 1
Allergic contact dermatitis occurs only in sensitized individuals and requires prior exposure, with symptoms appearing 24-72 hours after re-exposure, as stated by the American Academy of Otolaryngology-Head and Neck Surgery 1
Atopic dermatitis would typically have a chronic history starting in childhood, involvement of multiple body areas with characteristic distribution, and features like xerosis, lichenification, or hyperpigmentation, as noted by the Journal of the American Academy of Dermatology 2
The American Academy of Dermatology recommends considering alternative diagnoses, including atopic dermatitis, psoriasis, or systemic causes of pruritus, if the diagnosis remains uncertain or treatment fails after 2 weeks 2

The British Journal of Dermatology suggests using oral antihistamines, such as cetirizine 10 mg, loratadine 10 mg, or fexofenadine 180 mg daily, for pruritus control 5
The British Journal of Dermatology recommends considering skin biopsy if urticarial vasculitis is suspected, with painful lesions lasting >48 hours and systemic symptoms 7
The American Academy of Dermatology advises against using potent topical corticosteroids in intertriginous areas due to increased absorption and risk of skin atrophy, instead recommending hydrocortisone 1% 4