Over the past few weeks i have punched walls everyday and now my middle knuckle is swollen and changed colour it is also really squishy and painful?

X-ray asap: You need an X-ray and evaluation right away. Get to your physician right away, or go to the Emergency Department. And then stop punching walls! I assume you are doing this as an unhealthy coping mechanism for stress or trauma you are experiencing right now. Get to a psychotherapist immediately to discuss more effective coping strategies.