Contact Dermatitis Đánh giá ban đầu

Allergic Contact Dermatitis (ACD)

Initially, lesions of allergic contact dermatitis appear on the cutaneous site of principal exposure and may spread to other more distant sites due to contact or autosensitization. Lesions are typically asymmetrical, ill-defined, and unilateral. Specific signs and symptoms will depend on the duration, location, degree of sensitivity, and concentration of allergens. A patch test shows a reaction to the allergen.

Acute Allergic Contact Dermatitis (ACD)

Acute eruptions present with macular erythema, papules, vesicles, and bullae.

Chronic Allergic Contact Dermatitis (ACD)

Lesions are usually lichenified, scaling, and fissured with or without vesicles. Pigmentary changes can occur.

Other Types of Allergic Contact Dermatitis (ACD)

Airborne contact dermatitis is caused by an airborne transmission of contact allergen commonly seen on the face and neckline. Hematogenous contact dermatitis, also known as systemic contact dermatitis, occurs when an allergen is taken internally (orally, intravenously, or via inhalation) after epicutaneous sensitization. Photoallergic contact dermatitis is triggered by combined exposure to photosensitizers and ultraviolet (UV) light. Phototoxic contact dermatitis is seen in sun-exposed skin and lesions with a well-defined border. Protein contact dermatitis is induced by protein of either animal or plant origin.

Irritant Contact Dermatitis (ICD)

Areas that are prone to irritation from chemical substances are the face, dorsum of the hands, finger webs, palms, soles, or back. Lesions are usually sharply defined at contact sites.

Acute Irritant Contact Dermatitis (ICD)

Acute lesions are painful, edematous, erythematous, weepy, and vesicular. There is an associated sensation of burning, stinging, or pain in the site of contact with the irritant. This usually results from a single exposure to an irritant or caustic chemical.

Chronic Irritant Contact Dermatitis (ICD)

Chronic lesions are dry, erythematous, scaling, fissuring, cracked, and lichenified. Hardening and adaptation of the skin may occur due to repeated contact with irritants.