Metronidazole can not be used to treat skin eczema. Metronidazole is a kind of drug used to treat anaerobic infections, skin eczema is mainly related to allergic factors, need to use anti-allergic drugs under the guidance of a doctor, the use of metronidazole can not play a role in the treatment of eczema. The use of metronidazole does not play a role in the treatment of eczema. The treatment of eczema requires the use of topical glucocorticoid drugs, calcium-modulated neural phosphatase inhibitors, oral antihistamines and so on. If secondary infection occurs, antibiotic ointment such as mupirocin and fusidic acid can be used. Specifically need to go to the hospital, under the guidance of the doctor for the use of medication, not self-medication.