But cystic acne can persist for months. Blemishes on your face or body that are swollen and painful. Cysts that do not develop a "head" like other forms of acne. Blemishes that cause scarring ...

Inflammatory acne is the type in which bacteria inside a pore cause a red, swollen, pus-filled bump (pustule) on the skin. Cystic acne and nodular acne are two types of inflammatory acne.

NBC Select reporter Zoe Malin started using Differin gel for her hormonal and cystic acne as a teenager since it is the only OTC retinoid that does not require a prescription. “It helped reduce ...