Inner Child Work allows you to connect with that part of you that so badly needs your love and attention. When you release the pain of the inner child there can be integration, connection, and congruency of self. When that happens life changes into infinite possibilities.
"Who you are today - your strengths, problems, level of self-esteem, habits - is in large part a product of your development. At each age, from birth to toddler to child to adolescent, you were met with certain typical challenges. If your caregivers raised you in a natural way that allowed you to healthily traverse each stage and master the skills necessary to progress, you most likely ended up a well-balanced, confident individual with a strong sense of yourself.
However, at each stage, there are countless traumas, big and small, that can occur and keep you from resolving the issues of that stage. Unresolved issues stay with us throughout our lives, expressing themselves in our relationships with ourselves and others. If you have a pattern of unhealthy relationships, low self-esteem, addictions or other problems, you may well be experiencing the results of unresolved issues from these childhood and adolescent stages and you might be able to benefit from overcoming trauma.
As Cathryn L. Taylor says in The Inner Child Workbook, "If you react strongly to an interaction with someone, it is usually a sign that an old issue has been triggered. If as a child you were told you never did anything right, then as an adult, when that message is inferred, it will bring up the pain of the past. If in your current relationship you find yourself forever haunted with the fear that your partner will leave you, you may be reacting to an old experience where one of your parents left the other or left you. In other words, if you've been hurt in a similar way before, the hurt from the past as well as the present will emerge. If you find that no matter what you do you have a recurring reaction to a specific issue, it is most likely related to your childhood.
I do a lot of inner child work because it is my belief that is where the root of all of our problems start. When you change the belief of the child within your whole life can change. You can begin to create a new belief that better serves you as an adult.
"Numerous examples could be given, but it is most important to understand that you react strongly to people, places and things for a reason. When you find that reason, and heal the circumstances that created it, you are then free to respond to your present interactions, not react to them because of your past. You may not be able to change the facts of your past, but you can change the way you relate to those facts. You may have to rework each scene many times. The repetition will alter the experience, and each time your children within are rescued, they have more trust for you. The more trust they feel for you, the less they will influence your adult life."
Here is a great link to a talk on what happens to a child who goes through trauma.