They may also cause other trouble; for instance, if your collar chafes the back of your neck, and to relieve the itching you rub it a little too hard with your finger, your nail may scratch the skin; and if it be blackened with infectious dirt, this may get into the little scratch and give rise to a boil, or a festering sore.
"A Handbook of Health"
Woods Hutchinson
They were bad teeth, and the hand is now festering.
"From Bapaume to Passchendaele, 1917"
Philip Gibbs
She had not been able to let the light into the festering brooding that had subconsciously poisoned her mind.
"The Tempering"
Charles Neville Buck