Can hypnosis be used to uncover lost memories?

Many of us have things in our past that we cannot, for one reason or another, remember. Often, we want to uncover lost memories to help us make sense of our world. If we can’t remember, is our mind protecting us from something? Do we have to remember in order to move on? If we were able to remember, what then? Will knowing really lead to change? Sometimes it works the other way.