Many people think of anger as a negative emotion, but that's not the case. The reality is that most cancer patients feel anger at times: At diagnosis, when treatment is delayed and even after treatment finishes. Anger can actually be a helpful and motivating emotion if channeled properly. Anger is a very normal and healthy emotion in life as well as when you or a loved one has mesothelioma. Actively engaging with the feeling and finding healthy ways to express it is key to good anger management.