There are quite a few different types of Energy Healing, this is my own personal definition of energy healing and how I practice it combining a few different techniques I've learnt. I compare it to somatic therapy but more spiritual and less psychological.
Energy healing is recognising an imbalance in the body emotionally but also physically. Finding where in the body you can feel that emotion/tension. Describing how that emotion feels, what colour is it? Does it have a texture?
Finding the connection to an old the memory, experience and or trigger to the feeling. Recognising the feeling and relaxing and sitting with it. Giving it space to be expressed and letting the emotion come up for you. After giving the feeling some awareness it naturally releases that tension feeling from the body.
Some larger long term pain, issues and triggers generally take a few sessions to clear out, as they have layers of feelings and memories. But essentially energy work is finding emotions in the body that are stuck and releasing them because at the time they happened they weren’t recognised or felt but instead suppressed, "discarded" or parked into the back of your subconscious.
Once the energy is given time and space to realise the next step is to change the track, recommend reading the book "The Hidden Messages in Water" by Masaru Emoto . In summary of the book, Water is the element for life and water contains consciousness. We are 70% water so what you consume and are exposed to becomes your vibration whether thats music, TV, people around you and how you speak to yourself.
In my opinion and faith I believe God is water, thats how God is able to be every where and in every living thing but thats another kettle of fish haha
The final step to Energy Healing is to start to rewire the brain to create new thought pathways with positive affirmations and phrases. To help change your inner dialogue.