Stress can be caused by imbalance of three happy messengers- dopamine(hormone for pleasure),serotonin(hormone for sleep)and adrenalin(hormone for energy).Stress can cause imbalance to these three. Without dopamine the person become very sad and to him life appears all gloomy.All time he wants to weep without any reason. Without enough adrenalin he feels no energy left in him to do any work and prefers sitting and always tired.
To increase dopamine inbody the person should do jogging for 30 min .It will give him "joggers high" To maintain high level of serotonin and all other hormones a handful of groundnut can be taken daily. Also almonds and sevensea (omega 3 fatty acids) will help a lot.