This means that we can bring through the trauma and pain suffered by our Ancestors.
This may show up as various pains for ourselves. Your dominant side (the hand you write with) is your current life and your non-dominant side holds the pain and trauma of your Ancestors.
Ancestral Healing works on an Energetic Level through Music, Meditation, Energy work, Chanting, and Food Ceremonies. Previously, Ancestors would have to wait their turn to receive healing, and if there was a troubled Ancestor it could hold things up for those waiting in line, but not anymore!
It's evolved from being very linear to Ancestors being able to receive healing when they're ready. We invite them to attend and they can come from any era, any generation.