What is it?: There are two types of paronychia: acute and chronic. Both are caused when the seal between the nail fold and the nail plate is broken and infection gets in. Which bacteria enter the broken seal is one of the factors that determines if the condition is acute or chronic. Techs can tell the difference between chronic and acute paronychia because acute paronychia will be accompanied by pain and swelling within a couple of days of an injury and pus may be present at the site of the infection.How do you get it?: Many outside factors can cause acute paronychia, including improper manicu..