Pus is a thick yellowish, whitish, or greenish fluid made up of dead white blood cells, dead tissues, and dead bacteria or fungi. Also called liquor puris or purulent exudate, it is produced as part ...

Folliculitis is a common skin condition that occurs when hair follicles become inflamed due to infection, irritation, or blockage. The most frequent cause is a bacterial infection, though fungi and ...

Medically reviewed by Susan Bard, MD Key Takeaways Scalp folliculitis, acne keloidalis nuchae (AKN), and acne cosmetica are ...