A recent research has found out that expressing anger increases blood flow to a part of the brain thought to be involved in feelings of happiness. The findings are appearing to support the common psychological theory that expressing emotions is better for mental health than keeping them locked up.

Now scientists are curious to know that what affect the anger has on human body. They had gathered 30 men in a laboratory and slowly increased their anger levels to check their reactions. Then the volunteers were all given a list of written statements and asked to read each one silently and then recall a situation in which they felt that way.

The sentences were slowly escalated from "today is no different from any other day" to "I am consumed with hatred". From the start to the end of experiment, heart rate, blood pressure and levels of two stress hormones, testosterone and cortisol of all the men were measured and their brains were scanned as well.

Dr. Neus Herrero, from the University of Valencia in Spain, said that the left frontal region of the brain is commonly thought to be involved in experiencing positive emotions, while the right is more related to negative emotions. In addition, changes in cerebral activity also occur, especially in the frontal and temporal lobes.

The study has concluded that getting angry could have serious negative effects on the body, the heart rates and blood pressure levels also increases, although, cortisol level falls and testosterone increases.