Sorry to hear about your dad Andicat but I'm not able to help regarding lymphoadema. Both my in-laws have had radiotherepy, FIL for bladder cancer and no problems apart from sensitive skin initially but ok now. MIL is nearly 84 with, amongst other things, lung cancer, again sensitive skin was a problem and she was tired but having said that, she is still very tired 10 months later so I'm not sure it was the radiotherepy that caused it.

Hopefully someone on the forum will be able to help.