Kneading in cats can have many meanings, generally including physiological expressions, longing for their mother, a happy mood, asserting dominance, and a desire to mate. When a cat suddenly kneads, it indicates that it is comfortable, content, and at ease. Some cats also purr while kneading to express their joy.
Kittens knead to obtain more milk when they are young, and this behavior often continues into adulthood. They are more likely to knead when in contact with soft blankets or their owner's stomach. It is recommended that owners trim their cats' nails regularly to prevent accidental injury when the cat kneads on them.
