It is very hard to determine just how severe his head injury was. He has a large keloid scar on his scalp which would develop over time. He may have simply had a scalp laceration and the scar may have grown over time.
Do you have medical qualifications? If you do, is there any way to conjecture the severity of the original wound based on the mass of the scar tissue? Care to guess how long it would have taken to heal sufficiently for a soldier to return to combat?
You'd think Kerry and Tereeza could scrape up enough leftover change from those botox treatments and ketchup sales to spring for a little surgical work on their friend's scalp. Sheesh.
If he had been hospitalized for a head wound, a significant portion of his scalp would have been shaved while stitches were done. That could not have grown back evenly in one month.
The photo was taken prior to January 29.