[Emotions, stress, smoking, alcohol consumption and cancer--the correlational and causal connections].

Correlative and causal relationships are discussed between emotions, stress, smoking, drinking, and cancer. The following conclusions have been drawn. Emotions control the physiological stress reactions: the negative emotions initiate and maintain stress, and positive emotions stop it. A dissatisfied need provokes the development of the state of emotional stress. There are two types of emotional stress states: the active stress which is directed to "overcoming" and the passive state of "waiting till the stress is over". Individuals differ in emotionality, stress reactivity, and inclination to the active and passive emotional stress. The passive emotional stress increases the probability of cancer. This effect is caused by the development of the hormonal and neurotransmitter state, which provokes immunosuppression, DNA damage, and stimulation of hemopoiesis. Smoking and drinking are the ways of modifying the psychoemotional state. These habits as well as development of cancer are the effects of the same cause--stress. Thus, cases of correlation between smoking and drinking do not reflect the causal relationships. Only intensive smoking and drinking which lead to tissue damage can increase the incidence of cancer.