My brother fell at a friends house, and he thinks he chipped his toe knuckle, how do we confirm this?

Chips Ahoy...: I would expect that the toe would be swollen, possibly bruised and somewhat painful. All of these symptoms would be good initial indicators. However, the only effective way to tell is to have the toe x-rayed. In the meantime, applying ice to the area will help with the swelling and pain. Elevation might also have some benefit. Using the x-ray as a guide, the chip may be able to be re-positioned.