Can laughter therapy help fight a cancer or does it just make you laugh?

Quality of life: Laugher makes a person feel better and is important for a sense of well being. It is not likely to change the course of an illness, including cancer.

Subtle changes: Laughter, smiling, a positive attitude and all forms of enjoyment cause slight subtle changes in body chemistry which can help healing, but alone are certainly not enough to change the outcome of a major illness such as cancer. (similarly, bad attitude alone does not cause disease.) but each of these tiny changes gives us a little boost to help immune system and help tolerate difficult treatments.