My cat bit my hand last night. It's not the first he's done it - he's traumatised and he's scratched and bitten me quite a few times, but he's been good lately. I don't know what triggered him, I wasn't stroking him but he was sat on my lap and then he just lunged and bit and scratched my hand. The bite is on the back of my hand, near the wrist, but my hand hurts and it feels like I've pulled a muscle. My wrist and fingers are quite painful. I don't know if he broke the skin - it looks like a slight graze - but I'm wondering if I need to get it checked.