IPA: /ˈpʌstjʊlər/
KK: /ˈpʌstjələr/
Relating to or having small, raised bumps filled with pus on the skin.
The doctor diagnosed her with a pustular skin condition that required treatment.
Pustular → It is formed from "pustula" (from Latin, meaning blister or pimple) and the suffix "-ar" (meaning pertaining to). The word "pustular" refers to something that is related to or characterized by pustules or blisters.
Think of 'pustula' which means blister or pimple, to remember that 'pustular' describes something that has blisters or pustules.