paronychia AE 10034016 SZ, SS, YH, MW a skin infection AE thar occurs around the fingernails and toenailsnail. Bacteria or a type of yeast called Candida cause this infection. Bacteria and yeast can even combine into one infection. WEB: http://www.healthline.com/health/paronychia nail infection AE HPO: HP_0001818 SIDER: C0030578 WEB: https://en.wikipedia.org/wiki/Paronychia skin infection AE