Kurra welcome to the site!
I suggest you take him to the vet as soon as possible, all of those items you indicated are signs of pain. You may be correct on the abuse but you have no way of knowing for sure. To me it sounds like he doesnt want you to touch him because he is in pain. The air licking, the hunched back etc are all signs.
Good Luck and let us know how you make out!
Tabitha April 10, 1995 - August 23, 2013
Bomber April 10, 1995 - July 12, 2010
Winston Nov 15, 1999 - September 15, 2011
Sophie Aug 30, 2011
"UNTIL ONE HAS LOVED AN ANIMAL, PART OF THEIR SOUL REMAINS UNAWAKENED"
He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion.