Why do i feel sad all the time behind my smiles and laughs??

? Depression: Please note that your sadness is not your fault nor is it a moral failing. There are variations in our personalities and some people are sad by nature. However, it does not have to interfere with your life. It would be prudent to have a candid discussion with your doctor to assess if you could benefit from anti-depressant medication. I wish you good health, happiness and prosperity!