Most of the people I meet who are in pain are actually not in pain, they are just suffering from pain. They are suffering because either they are living in past pain or future expected pain. Since the time we are born we start going through pain. The birth itself is a process of pain for both mother and the baby. The mother has to go through a huge pain and the baby also has to, he has to leave his comfortable womb and come out of a small opening and then his cord of life is ct in few seconds, the cord which had been a source of everything for him uptil now. We as he is do not like any change in our life and we like to live comfortable life, just imagine for a baby, his entire world is changed in few minutes, his pain is ignored as he is unable to express it. Anyway the question is not about pain, it is the every moment is pain if we realise but we do not have to suffer if we choose to by realising that we have chosen to suffer by not living in present.
We forget to live in present, which is the only reality and suffer. We worry so much about future that what is happening now, we ignore. However, we do not realise that if our present is fine, future has to be fine and even if it will not be, who guarantees anything in life and if you cannot why to worry then. There is no other reality then what is happening now, rest all nothing exists, whatever was there is over and whatever will be there will always be uncertain. So live in the joy of present as that is the only truth and that is all you have.