Rachel, I found this in the Best of Shelley forum under the section on "Basics of Detoxing and Healing Crisis":
The healing crisis will usually bring about past conditions and personal issues so they can be dealt with and released for all time. Please be aware that the issues may be mental/emotional, not just physical. The healing crisis can include periods of anger, irritability, depression, and intense bouts of sobbing. You don’t have to know which trauma you are releasing to release it, so just go with the flow and let it out.