Carson is getting his 2nd molars and he's in so much pain. He's been so grumpy and chews on his hand…

Carson is getting his 2nd molars and he's in so much pain. He's been so grumpy and chews on his hand constantly and always has a stream of drool coming down. What can I do to help him? Teething rings and stuff like that won't work because the molars are so far back in his mouth obviously 😭