Glad you found some answers, and I suffered that also with two different chemo treatments. I was going to say it sounded like Erbitux or Taxtore, which can cause hand and foot syndrome. Another item I was told to use by a chemo nurse was crazy glue on the cuts to seal, tree tea oil, but that smelled too much like terpentine. I used bandaids instead on my fingertips, and Aquophor or Cetaphil, under the socks, gloves. Does he have shingles or a question the rash is? Anyway, I had shingles 4 months after radiation, which is one of the worst pains. There is a vaccine for shingles, and heard, I'm not sure, you can get it again even though you had it.