The phrase "gentle massage" means softly rubbing or kneading someone's body in a calming and tender way to provide relaxation and relief. Full definition
Make it a wonderful time to bond with your baby using warm water and gentle massage using the soap. (thankyourbaby.com)
You can also use gentle massage before and during nursing so you can encourage more milk to flow and so she feels the milk flowing and will keep sucking. (lansinoh.com)
Start preparing for a nursing session by using gentle massage on your breasts. (expressing-mama.com)