Mine was bumpy, but appeared more under the skin, very itchy.

I will tell you, I was 69 at the time, not ever doing drugs other than prescription. I went to a dispensary here in Nevada.
Told them what I was going through, still in active chemo, the folks could not have been any nicer to me.
Told me of a topical cream, bought it, worked within minutes. Told my Oncologist, he said that was fine 🙂

Itching stopped, bumps went away

Hi! I would absolutely call your Oncologist and let them know. I assume they will want to see it. I had a rash once during my treatments and they did want to look at it. I hope you have a good day!! Kelly

I’m sure this is not what you have going on but I developed Shingles while going through my radiation treatments. Does your rash hurt?

I'm on my second month of it at 420mg, my lymph nodes are down but still hurt as well as my arms and lower back, tired all the time but it really seems to be working for me.

Guest house in Pahrump Nevada. Close to well, 35 miles from Death Valley N.P. and other attractions in southern Nevada