Credit: SWNS Kristen Beattybr br A cancer survivor revealed her do's and don'ts for what to say to a cancer patient - after being told to "look on the bright side" during her treatment.br br Kristen Beatty, 33, was diagnosed with non-hodgkin lymphoma - a type of cancer that forms in the immune system - after experiencing chest pain.br br She underwent chemotherapy and was given the all clear a year later.br br Kristen shares her story online and gives advice on how to address the topic of cancer.