Its been 6 years now that i had a malignant tumour removed from my jaw and receieved chemo to the left hand side of my face and yet my facial stubble has not grown back at this side.

My friends joke with me and say 'well at least it dont take you as long to shave' and we laugh, although this is true, but because it doesnt grow, i have to shave the right side every day so i do not have just 1 side of stubble.

Do any of you guys have any idea when it possibly would grow back, if ever?