Fill a sock with rice, tie up the open end, heat it up in the microwave, rest it around your neck.
Make sure you relax too. Keeping it tense or focusing on a computer screen isn't going to help. Lie down with that rice-sock.
This is the most sensible answer by far. Considering he's strained his muscles, forcing his head around won't help, it'll just force them more. To all of you people who say it helped you, well, it probably didn't you would've gotten the same results just as quickly if you had left it alone. This is a healing thing; it's not like the muscle is stuck on something. What the warm rice sock does is not only ease the pain a bit, but helps loosen up the tense muscles and get them back to their normal positions more quickly.
Please don't keep suggesting things that will only hurt OP more.
