Jake,
I have a near identical history of the scrotum itch and rash. Mine started during the 3rd cycle of 4 on/2 off. I am now just finished my 5th cycle. Toxicity must be building a little each cycle as the side effects seem to start a little earlier each cycle.
Last cycle it hit late in the 2nd week, and stayed with me until 4 days after the end of taking the drug. I am 58, 6'5" and 320 lbs. I am pretty active, and being overweight, the rash really rubs me the wrong way (if you know what I mean).
I read a blog that turned me onto BAG BALM (Seriously.....that is the name on the can). I got it in the lotions department of my CVS Pharmacy. I have heard other references to UDDER CREAM and I think it might be the same thing. I was designed to soothe cow udders that become sore and irratated.
Surprisingly, the DANG STUFF WORKS! It immediately cools the itching and if you keep it on thick, it reduces the irratation of walking. I use Altoid mints to address the tinny taste in my mouth, and I save the little metal cans to fill with Bag Balm to have a pocket size supply with me at all times late in the cycle.
Dont know how I wouldnt be bed ridden if I hadn't found this stuff. Hope it works for you. Let me know.
Good luck,
Charlie