Detailed answer

1. Blackheads: These occur when pores become clogged with excess oil and dead skin cells, leading to an open comedo that appears black in color.2. Whiteheads: Also known as closed comedones, these are similar to blackheads but have a closed surface, resulting in a small, flesh-colored bump.3. Pimples: Commonly referred to as zits, pimples are formed when pores become infected with bacteria, resulting in red, inflamed bumps with pus.4. Nodules: Nodules are large, painful, solid bumps that form beneath the skin. They can be more severe and deeper than regular pimples.5. Cysts: Cystic acne is the most severe type and consists of deep, inflamed, pus-filled lesions that can cause scarring. They are typically painful and may require medical attention. It is crucial to consult a dermatologist for proper diagnosis and treatment of acne depending on its severity and type.