What a Cat Purr Really Means

Unhappy cat makes unhappy sound is TOO simple of a reasoning. Cats are more nuanced creatures and context is important to know how to read your cat when they decide to put your lap to use.
Contentment Is the Main Reason
Ninety nine percent of the time, a common phenomenon of a purring cat is a genuine sign of happiness. When Juniper curls up on the couch after dinner, she purrs because she is comfortable and feels safe. Most importantly, she is where she wants to be.
This is the sort of purr we know best. It comes during petting, feeding, and cuddling. It can also happen during those quiet moments when your cat is just hanging out. In these cases, the purr is often a sign of relaxation. Behaviorists believe that it's a signal of contentment and also serves the purpose of self soothing.
Cats Also Purr When Stressed
Here is some of the interesting information. When cats are injured, in pain, or are giving birth, they sometimes purr, as well as at the veterinarian's office. Researchers speculate that endorphins are released when cats purr that aid them in soothing themselves during tough times. If your cat is purring while simultaneously hiding, breathing rapidly, or exhibiting weird behavior, don't take it for granted that everything is all right. Pay attention to the other signals and if anything seems off, contact your veterinarian.
Kittens Purr to Communicate
Kittens begin purring just a few days after they're born. While they nurse, they purr and their mother cat responds in purrs. The purring signals communication from the kitten, telling the mother, "I'm here" and "everything is fine."
This behavior continues in their adult life. Cats will often purr when they want attention, ask for food, or just want to be petted. It is almost like a polite request.
The Healing Purr Theory
A few studies have shown that cats purr at a frequency of around 25 to 150 Hertz, and that this may promote the healing of tissues and the growth of bones. While this is an interesting possibility, it is not conclusive.
However, it is certain that when cats are stressed and purring, it is comforting to them. Many owners say that they also feel calmer when a cat is purring near them. Although it may not have healing properties, it definitely is not a negative thing.
When your cat purrs, keep in mind that they could be communicating a message. In general, purring with relaxed eyes and a limp body can be a good sign. But, if your cat is purring and something seems off be sure to take note of all the other clues. Cats like to communicate on a more subtle level and purrs are just one part of the whole picture.