A few possibilities: It could be caused by an infection caused by bacteria, yeast or even herpes. It may also be caused by a number of different skin conditions called dermatitis. You will need to see your provider to find out what is causing this and how to best treat it. Look at this site for more information: http://dermnetnz.Org/site-age-specific/fissured-fourchette.Html.
Answered 12/19/2015
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