The main symptoms of contact dermatitis are erythema, papules, blisters, itching, swelling and pain, etc. In severe cases, systemic reactions such as fever, headache and chills may also occur. Contact dermatitis is due to skin contact with certain exogenous substances caused by inflammatory skin reactions, in contact with the site can appear erythema, or the size of a needle tip dense papules, the more serious patients can appear obvious erythema, swelling, blisters, blisters, vesicles, vesicles or even necrosis, ulcers and so on. May also be accompanied by fever, chills, headache, nausea and other symptoms. Contact dermatitis through active and effective treatment, the general prognosis is good, mainly through symptomatic treatment. For example, for infected patients, mupirocin and other drugs can be used, itching is serious, can follow the doctor’s advice to use benzhydrylamine and other antihistamines. Severe acute patients, also need to use prednisone and other glucocorticoid drugs. When symptoms such as skin erythema, papules, blisters and itching appear, they should be taken seriously and go to the hospital in time for consultation and treatment, and should not be treated on their own.