This is the 'neuropathy' that people talk about with chemo especially the 'T' bit.
My advice is to keep those tingly bits cool as it can help. No need to freeze 🙂 but maybe keep a lip balm or lip cream in the fridge. Same goes for hands and feet, keep them cool when sensations arise. It can help to cool any bits which get buzzy.
I've been suffering with oral thrush, ulcers and general sore mouth for a few days. Thanks to Gelclair and difflam this is now under control. But now I've started with a pins and needles kind of sensation in my lips.