Overstimulated glans penis

25 years, male, 191cm height, 100kg weight, vaping used to smoke regular cigs for few years.

As in title my glans penis is so overstimulated when I just slightly touch it directly (not through skin) it hurts so much I can't stand it. I also have a problem with too short frenulum of the prepuce (I hope it's the right medical term, sorry english is not my first language) which I think might be connected to the overstimulation problem since my glans penis was never really exposed for any direct physcial contact. And I remeber from my early childhood that whenever my mom tried to pull back the foreskin from my penis I cried in pain maniacally.

I had an appointement with urologist and he told there's no cure for that overstimulation and before the operation of frenulum of the prepuce we need to get rid of that problem first, so he prescripted me a anesthetic ointment and told me to pull back the skin, use the ointment and try to touch it then and make it used to the physical contact.

I'd just like to ask is it really going to work? I can't really find any info on that. Right now it's also a psychological problem, whenever I try to touch the tip, I'm so scared my heart starts pumping so much I can hear it.