Usually the messages are more gentle to begin, however it you do not listen and heed these messages the messenger has to get louder for you to take notice and do something about it. Pain is a great way to get your attention and if required stop you completely in your tracks so you have to consider doing something differently. That may mean simply you need to rest more and not push yourself so hard all the time.
This is the gift of your body, it is the messenger of your spiritual guidance been delivered to you from your higher wisdom. It has the expanded perspective of whom you truly are on a soul level and loves you unconditionally .
Julia Cannon who is Dolores Cannon's Daughter (the developer of QHHT), published her book last year titled SOUL SPEAK. In this book she explain how the bodies messenger is very literal once you begin to understand its language and how its is communicating to you. She spent many years working as a nurse and draws on this, her Mothers's QHHT sessions and guided intuition as the resource for this book. Here is a latest interview with Julia.