Boils and cysts both look like bumps on your skin. The main difference between a cyst and a boil is that a boil is a bacterial or fungal infection, and is more likely to be painful. A boil (furuncle) ...

Swollen cheeks aren’t always serious, especially if you’re not experiencing pain. That said, it could mean a medical emergency like anaphylaxis, or a serious underlying medical condition like cancer.