This is how energy healing works. The healing energy effects matter in a positive way. It can come from a specific healing modality like Reiki, chakra therapy or sound healing to name a few common ones. Or it can come from something less structured like creative visualizations (very powerful), healing music, or even something very common, like a bubble bath.
Energy is not made the same. Some energy is good and some is bad. Examples of good energy are: A healing touch. A massage. A kiss from mom on a skinned knee. Reiki. Feeling supported by your loved ones. That sort of thing.
Examples of bad energy are: Stress in the workplace. A person demeaning you or belittling you. Being too busy. There's also environmental bad energy like pollution, emf waves from electrical appliances and power plants. Radiation.