Cats often hide their pain, but certain non-verbal cues can be telling. Changes in body language, such as limping, reluctance to move, or a hunched posture, are key indicators. Pay attention to grooming habits; a cat in pain may neglect its coat, leading to a greasy or unkempt appearance. Facial expressions can also reveal discomfort; flattened ears, squinted eyes, and an overall tense appearance are red flags. Additionally, if your cat is hiding more than usual or becomes unusually aggressive or withdrawn, it might be experiencing pain.