Andy, have a sit down with him asap.
While it may not be serious, it very well might be.
He is a Brother and a Friend. Is He stupid? This is something that needs to be looked into. Kidney Stone, BS, while I never had one, My Best Friend has and it hurts like hell.
Now, my question?
Normaly one does not see blood dripping from Penial area. If it is, a major Problem!
Beat feet to get with him, be a Brother and Friend. Or, carry him to the hole in the earth. Never know do we?