Metronidazole Gel needs to be stored away from light, because light will cause its drug components to decompose and become ineffective. Metronidazole gel is an anaerobic drug, the main ingredient is metronidazole, suitable for inflammatory papules, pustules and rosacea erythema local treatment, apply to avoid contact with the eyes and other mucous membranes, such as the mouth, nose and so on. It should be noted that pregnant women as well as lactating women are prohibited from using the drug, the use of people who are allergic to metronidazole is prohibited, allergic people should use with caution, and patients may experience dry skin, burning sensation and skin irritation and other adverse reactions after use. It is recommended that if you want to use the drug, it should be used under the guidance of a doctor, do not use it without authorization, to avoid delaying the condition. If there is burning sensation and redness at the site of application, the drug should be stopped immediately, and the drug on the local area should be washed off, and go to the hospital for medical treatment.