The science behind why cats purr

The science behind why cats purr - Hemp Well

Cats purr for a variety of reasons, but the most common reason is to show contentment. When a cat purrs, it is actually vibrating its vocal chords at a frequency that is soothing to both the cat and the person nearby. Purring can also be a sign of stress or anxiety in some cats.

The science of purring

Purring is a low frequency vibration produced by cats at a rate of 20-30 vibrations per second. This low frequency is produced by muscular contractions in the larynx and diaphragm. Purring has long been thought to be a healing mechanism for cats. Studies have shown that purring can help heal bones and injuries, reduce stress, and build muscle mass. Cats purr when they are content and happy, but they also purr when they are injured or in pain.

There are many theories, but the science behind it is still not fully understood. One theory suggests that purring is a form of self-healing. Cats have an amazing ability to heal and calm themselves.


Another theory suggests that cats purr to communicate with other cats. Authors of a 2008 study found that cats who live in multi-cat homes communicate with their neighbors in loud purrs. These neighbors then move closer to the cat, enhancing their ability to hunt. 

How do cats purr?

Cats purr by vibrating the muscles in their vocal cords, which produces a low-pitched sound. The frequency of the vibration is usually between 20 and 140 Hz, which is similar to the frequency of an earthquake.

The act of purring is beneficial for cats. Discussed earlier, purring has been shown to lower stress levels, help with pain relief, and promote healing. When a cat purrs, their body releases endorphins, which are natural painkillers. Purring also helps cats heal by increasing blood flow and helping bones and muscles

What are the benefits of purring?

Purring is a low-frequency hum that cats make when they are content. It's thought to have multiple benefits for both the cat and their human companions. For the cat, purring may help to heal bones and wounds, ease breathing, and build muscle. For humans, interacting with a purring cat can lower blood pressure and reduce stress.

Spend more time with your cats and you can both enjoy the benefits.

 

We have sourced organic hemp responsibly since 2012. Let us help in your pet's journey.

Article review

How this Hemp Well article is reviewed.

Written by Thomas Bowers

Author bio: Hemp Well’s editorial team writes pet wellness articles using Hemp Well product knowledge, label directions, customer questions, and responsible hemp education.

Reviewed by Hemp Well Product & Quality Team

Reviewer bio: Reviewed for product accuracy, claim discipline, label consistency, and Hemp Well quality standards.

Last reviewed September 17, 2025

Veterinary note: This article is educational and is not a substitute for diagnosis, treatment, or advice from your veterinarian. Veterinary credentials are listed only when a specific veterinary reviewer is named.

Editorial policy, veterinary note & source citations

Editorial policy: Hemp Well content is written to help pet parents understand pet hemp products, serving-size considerations, product formats, quality standards, and safer shopping decisions. We avoid disease-treatment claims and update articles when product labels, regulations, or available guidance changes.

Veterinary note: Hemp Well educational content is not veterinary medical advice. If your pet has a medical condition, takes medication, is pregnant, intended for breeding, or symptoms worsen, consult your veterinarian before starting or continuing any supplement.

Sources and references:


Find your formula

Learn by pet.

Dogs, cats, birds, and horses use hemp in different ways. Start with the animal you care for and move from education to the right product faster.