[My baby Milo]

He started yesterday licking his right paw. He has been doing it all the time. He will b walking and stop to lick. He woke me up licking. I had to put him in the floor but he would jump back on the bed and start again so I put him at the end of the bed and told him no. He just kept on licking. He has never licked his paw this much. I have looked at it and I don't see anything. He still plays and runs on it but if he's not doing something he's licking. The only thing I can figure is that I gave him 2 pieces of pasta the night before. He is on a grain free food. Any suggestions? I am going to take him to the vet today if he don't stop.