If the glans urethra crack a small slit is caused by bacterial infection, usually the external use of erythromycin ointment can be good, but due to the existence of variability in the individual’s physique, can not be generalized. The patient’s glans urethra cracked a small slit situation, most of the consideration is due to inflammation stimulation. If it belongs to the bacterial infection, usually the topical erythromycin ointment can improve the symptoms of the disease, can promote the recovery of the condition. Erythromycin ointment belongs to macrolide antibiotics, suitable for most gram-positive bacteria, some gram-negative bacteria and other pathogenic bacteria infection. However, if the patient is allergic to erythromycin components, the use of erythromycin ointment should be contraindicated. Pregnant and lactating women, as well as people with allergies, need to use the drug under the guidance of a doctor. Some patients may experience adverse reactions such as skin itching and pain during the use of the drug. If the patient’s medication site appears burning sensation, itching sensation and other uncomfortable symptoms, you should immediately stop using the drug, and the local drug clean, if necessary, go to the regular hospital in a timely manner, report to the doctor.