Writing your expression can heal your physical bound. This came is research. It is long said that writing your expression help psychologically as well.  Research has showed that those who has taken part in research does not noticed any good psychologically but their physical wound has healed sooner than those who has not taken part in it.

Image from WisdomOfHealth

It is said that you can write your expression and burn the paper to help overcome yourself from emotional turbulence. It helps in mental health.Actually I think it is expression that helps. Expressing your emotion helps!

Here is the research finding about writing expression and its healing power.