Question: what the difference between a spot and zit?
Answer: Pimple - a small pustule. Pimples develop when sebaceous glands, or oil glands, become clogged and infected, leading to swollen, red lesions filled with pus (as described in the above section). Pimples are also called zits, or spots (if you're in the UK). Whitehead - a comedo covered by a layer of skin.