Hi Niccole,
I'm sorry to hear about your Mum's total glossectomy. I had mine in August last year. My stitches in my mouth dissolved over time. It was a relief when the ones in my lip disappeared!
I can't remember how long it took, but I do remember that when the swelling started to die down, some of the stitches tickled me. It didn't last too long though.
I hope your Mum and yourself are doing OK