Cats also purr when they are in pain or feeling stressed as a way to calm themselves.

Cats don’t only purr when they’re happy. Sometimes, they purr when they’re hurt, scared, or anxious. This might seem strange, but purring can help calm a cat down and soothe discomfort. It’s like a natural way for cats to comfort themselves, similar to how people might hum or rock when upset. The vibrations of purring may even help reduce pain and swelling, aiding in healing.