What do tonsils during a cold?

Enlarge and become inflamed.

During a cold, the tonsils can become enlarged and inflamed. This is because the tonsils are part of the body's immune system and they help to fight off infection. When the body is fighting off a cold, the tonsils can become swollen and red. This can cause a sore throat, difficulty swallowing, and a hoarse voice. In some cases, the tonsils can become so swollen that they block the airway, making it difficult to breathe. If this occurs, it is important to see a doctor immediately.