Tonsils, part of the human body's lymphatic system, assist in with the immune response. Found in the back of the throat, these glands may enlarge, leading to snoring and sleep apnea, recurring sore throats, bad breath and difficulty swallowing.

Tonsils, the lymph nodes at the back of the mouth and top of the throat, assist with filtering bacteria and other microorganisms out of the body to stop infections. Bacterial or viral infection may cause tonsils to swell from inflammation, and may create symptoms such as sore throat and fever.