Paronychia is mostly caused by nail ingrowth into the flesh or local trauma, and can be treated at home with topical povidone-iodine disinfection and mupirocin ointment application if pus appears. Additionally, oral cephalosporin antibiotics can be taken to help healing gradually. However, paronychia tends to recur frequently. Once it occurs, it is recommended to visit a dermatology department at a formal hospital to have the nail trimmed or to consider surgical treatment to prevent recurrence. It is also advisable to avoid wearing tight, cramped shoes to prevent trauma or crushing injuries. Once paronychia develops, the amount of local pus can vary; generally, quicker recovery can be expected once the pus is cleared. (Use medications under the guidance of a doctor.)