Pustule
/ˈpʌstjuːl/
"Pustule" in a Sentence (3 examples)
A bright red pustule began forming on Haziq's nose during dinner.
About the eighth day, the pustule is fully formed, when symptoms of small-pox are usually felt,—headache, shivering, loss of appetite, etc.
Pigmy pagodas sprouted like pustules.