You can use povidone-iodine, compound polymyxin B ointment, mupirocin and other drugs to apply. 1. iodophor: the drug is a topical disinfectant with broad-spectrum bactericidal effect, you can use iodophor to smear the affected area after breaking the skin while cycling, which is conducive to anti-inflammatory and prevent infection. 2. compound polymyxin B ointment: the main components of the drug have polymyxin, neomycin sulfate, etc. It can be used to prevent bacterial infections of skin cuts and abrasions and other skin wounds, and can also relieve local pain. 3. mupirocin: the drug is a local topical antibiotic, can be used for gram-positive cocci caused by infections, such as small superficial trauma co-infection. Bicycling broken skin need to be based on the condition of the medication, it is recommended that timely consultation, strictly comply with the medical advice to use medication.