Contact dermatitis, also known as toxic dermatitis, for the skin or mucous membrane in contact with certain external stimulating substances or allergens occurring inflammatory reaction, contact dermatitis symptoms include: 1. Acute contact dermatitis: the main manifestations of erythema, redness, blisters, and other damages, accompanied by itching. Local wet compresses can be treated, while oral anti-allergy drugs, if necessary, hormone therapy can be applied; 2. Chronic contact dermatitis: the main manifestation is a dark erythema, hypertrophy and other damage, conscious itching. Topical hormonal ointment, while applying skin care agents, is conducive to the recovery of skin lesions.