Bactroban is the trade name, generic name mupirocin, urethral red if it is caused by gram-positive cocci and so on, usually can use mupirocin, patients need to follow the doctor’s advice to use this drug. Mupirocin belongs to a kind of antibiotic drugs, used for gram-positive cocci (such as staphylococcus and streptococcus, etc.) and some negative bacteria caused by skin diseases, common diseases are folliculitis, boils, impetigo, eczema and so on. Therefore, the drug can be applied if urethral redness is caused by the above-mentioned pathogenic bacteria. The drug should be contraindicated for those who are allergic to the components of mupirocin, and pregnant and lactating women need to use it with caution. If after a course of treatment the patient’s symptoms have not improved, or even worsened, he should consult a doctor. During the use of the drug, patients may experience local burning sensation, stinging sensation, itching and other adverse reactions, generally do not need to stop using the drug. After a period of time, it can recover by itself. However, if the patient develops systemic allergic reactions, such as rash, swelling, breathing difficulties, etc., the drug needs to be stopped to avoid damage to health. Patients with urethral redness need to go to regular hospitals and undergo relevant examinations so as to clarify the cause of the disease and take relevant treatment measures under the guidance of doctors.