Time and season, Doshas and season, Age, Sex, Regional factors, Occupational factors, Excessive, inadequate or abnormal use of sense and motor organs : Its Effect on Living creature

Psychological factors like fear and anger, which result in stress and sympa­thetic activity increases vata and pitta doshas in the body. On the other hand, joy or happiness that increases parasympathetic activity would result in in­crease in the kapha doshas in the body.