Differential diagnoses: Painful nails Dr Nigel Stollery compares four presentations and offers clues for their diagnosis including subungual haematoma, paronychia, pincer nails and subungual viral wart. by Dr Nigel Stoller Sign in to continue Sign In Email address Password Stay signed in Trouble signing in? Reset password: Click here Need help? Email us Register FREE Limited free articles a month Free email bulletins Register Now Register Now Take a 30-day trial Join MIMS now and pay nothing for the first 30 days Join GPOnline now and pay nothing for the first 30 days Sign Up Sign Up