Inflammatory acne occurs when blocked pores (comedones) experience a surge of bacterial activity and an immune response, causing redness, swelling, and pain. Unlike non-inflammatory acne (blackheads and whiteheads), inflammatory lesions sit deeper in the skin and carry a higher risk of scarring.Follicle Wall Rupture: As pressure builds, the follicle wall ruptures beneath the skin, spilling bacteria and oil into the surrounding dermis.Immune Response: The immune system responds with white blood cells to fight the infection, resulting in redness, heat, swelling, and pus formation.