Toxicity

Thanks @HIT I will ask the nurse when I go in a couple of weeks and maybe like the chemo I will get some information on my radiation.

Thanks primek, had to keep looking up some medical terms but the article was interesting.   Nellie if you are going to see your Radio Onc a lot make sure she knows you are having trouble understanding her.  I only saw mine twice.  Also if its like mine there are radio nurses available all the time, so any questions or problems ask, they are great and will get your radio onc of necessary.  I had a lot of trouble understanding my chemo onc, so we worked it out.  I often wrote down my problems and he read and wrote anything he thought necessary.  I did get used to his way of speaking so it didn't end up being a problem.  

This article explains it I think. 

It's about timing the correct dose over days. Getting it right prevents toxicity. 

https://patient.info/doctor/radiotherapy-pro

Tell the oncologist you need to talk to her again. Get hold of the nurse at the radio unit and get her to come with you.
This stuff is really tricky from a political correctness point of view, but if you can't understand her it is perfectly reasonable to make a respectful request for clarification.
I think you will find she has given you the standard spiel about every treatment having potential side effects but you need to give informed consent, so you have to understand what the risks are. Ask for some literature--she should have something she can give you.
Rads seem like a doddle after chemo, but there are so many variables that you really can't compare your treatment with someone else's. The toxicity thing will relate to your particular dose, where it is delivered and what chance there is of periferal damage. Most cancer treatment involves some degree of toxicity,  but it represents our best chance of survival.

@LMK74 @KatyJoy yes I might ask the nurse at my next appointment when I get my tattoo's

No idea, could you ask the radiation nurse or do you have a breast care nurse?

Sounds strange. I'm starting radiation on 26 September. Never any mention of toxicity.