My granddaughter is teething and chewing her fingers and hands. Nothing seemed to soothe her pain. She didn't want any teething toys. So gave her her toothbrush. My daughter put on the Elmo video that says , "Brushy, brush, brush."
She started brushing far back in her mouth where her new teeth are coming in.
It worked like a charm, some relief for a little while.
I hope this works for your little one, too.