Am I radioactive if I get radiation?
No. With the usual kind, where a beam comes from a machine, nothing stays in you afterward. You can hug your children and sit with anyone you like.
A few treatments put a radioactive source inside the body for a while, and those come with rules for a few days. Ask your team whether yours is one of them.
Written by two physicians. Checked against patient information from the US National Cancer Institute and Cancer Research UK.