Short answer: purring is most commonly a sign of contentment, but cats also purr to self-soothe during pain or stress, so you need to look at accompanying body language and context to tell the difference accurately.
What does happy purring look like?
If your cat is purring while lying comfortably or being petted, slowly blinking, or with a relaxed, loose body posture, it's most likely a sign of contentment and comfort.
Why do cats purr even when they're in pain?
Purring also serves a self-soothing function, so cats sometimes purr even during pain or stress. There are documented cases of injured or sick cats purring as well.
What are the 3 signs to tell them apart?
① Whether the body is relaxed and loose, or tense and hunched ② Whether they're avoiding a specific posture unlike usual ③ Whether there are other changes present, like appetite or activity level. Looking at these three together helps you tell the difference.
What if my cat gets sensitive when I touch a specific spot while purring?
That could mean there's pain in that area. If unusual purring is paired with a specific reaction like that, it's worth considering a vet checkup.
What if a cat who rarely purrs suddenly starts?
It could be a sign of a change in their condition. Watch for other unusual behavior over the next few days, and if you're concerned, get a vet checkup.