Bridget Kindle on Instagram: "Cystic acne is a severe, painful type of inflammatory acne causing large, deep, pus-filled bumps under the skin, often triggered by hormones, genetics, and clogged pores, leading to potential scarring if untreated. What is the main cause of cystic acne? The main cause of cystic acne is a severe inflammatory reaction deep in the skin when excess oil (sebum), dead skin cells, and bacteria (like P. acnes) get trapped in a clogged pore, leading to large, painful, pus-fi