The Impact of Stress, Anxiety, Fear and Depression in The Cause of Cancer in Humans

Abstract

Anxiety is an emotion characterized by an unpleasant state of inner turmoil, often accompanied by nervous behavior, such as pacing back and forth, somatic complaints, and rumination. Depression is a state of low mood and aversion to activity that can affect a person’s thoughts, behavior, feelings, and sense of well-being. Fear in human beings may occur in response to a specific stimulus occurring in the present, or in anticipation or expectation of a future threat perceived as a risk to body or life. In psychology, stress is a feeling of strain and pressure. Also, this is one type of psychological pain. Cancer as mentioned by Drs. Zaminpira and Niknamian, is an Evolutionary Metabolic Disease (EMHC) which is caused by increasing the amounts of Reactive Oxygen Species (ROS) through the Butterfly Effect (BE) inside human eukaryotic cells. Therefore; increasing inflammation is a promising factor in the cause of cancer. The aim of this review and meta-analysis is to find the link between the depression, stress, fear and anxiety and the possibility of causing cancer. These emotional states have been observed in cancer patients as well. Anxiety and Fear are the two main emotional states which are the side effects of cancer disease, and also, high amounts of emotional stress and depression have been discussed in this review to raise the possibility in causing cancer.