Three cases of retronychia

Retroncyhia shows ingrowth of the nail toward the proximal nail folds. Initial events start from minor trauma of the digital pulp that disturbs longitudinal nail growth. This disturbed growth of the nail changes the growth direction to the proximal nail folds, leading to persistent paronychia, formation of granulation tissue, and other nail changes. Simple avulsion is curative and can improve most symptoms. There are few reports about retronychia in the English literature, and we report 3 cases of retronychia here.