What is a Paronychia? Learn more about its symptoms and causes   Paronychia is an inflammation of the skin bordering a fingernail or toenail. Another term for it is whitlow. It may be associated with felon. What causes paronychia? Acute paronychia is usually due to bacterial infection with Staphylococcus aureus (which may be multiresistant),  Streptococcus pyogenes, Pseudomonas, or other bacterial pathogens. It […]