Arching their backs is a natural way for cats to stretch their spine and muscles after rest.
Cats often arch their backs during play to make themselves look bigger and more intimidating to their toys.
Arching can be a form of communication, signaling submission or readiness to engage with other cats.
When feeling threatened, cats may arch their backs to appear larger and more formidable to potential predators or threats.
Sudden loud noises or unexpected events can cause a cat to arch its back as a fear response.
Cats in pain or discomfort may arch their backs as a reaction to their physical condition.
If a cat is annoyed or irritated, they may arch their back as a sign of annoyance and potential aggression.