Purulent: Pertaining to pus. Containing or composed of pus. The term "purulent" is often used in regard to drainage. For example, gonorrhea in men usually causes a purulent discharge from the penis. From Healthy Resources How IL Inhibitors Work to Treat PsoriasisModerate to Severe UC: Targeted SolutionsExpert Insight on a New Treatment for C3G Featured Centers What Are the Best PsA Treatments for You?Understanding Biologics 10 Things People With Depression Wish You Knew