my scalp is still tender

As I no longer own a brush or comb (nothing to do with the cancer and losing my hair, it's just that I had short, cropped hair for hairs and such items were superfluous), I am seldom in touch with my scalp. That is, I wash it every day with a mild shampoo - the same one I washed my balding hair and stubble when it fell out from the chemo - but do not tug at my hair.
So it was interesting to go to the hairdresser yesterday and notice that my scalp is still super tender. When Carlos just pulled a little on it to put on the highlight mixture, I shrieked. The same when he scrunched my hair with his hand to hold it under the diffuser.
Mmm.. interesting, considering that it is now about 18 months since I finished chemo and have a headful of very healthy looking hair, even if I say so myself. It's bouncy and lekker.

chemo hairgrowth

Doing a little googling re chemo hairgrowth but still unsure how long it's gonna take.
This video is more intriguing than helpful, and intrigued that it ends by saying she is proud to be a cancer survivor.
you tube video
Also read somewhere it grows 1/4 inch per month but guess like everything else re cancer, there are not hard and fast rules, and it depends....