If you do practices very intensely or push yourself too fast, some physical, emotional or energy problems may erupt that make it difficult to sleep, eat, think, work, or function effectively. It is best to do these things in moderation, because it is hard to overcome the problems once they occur. You might also look for ways to discharge this energy by running, exercising, gardening, or working with something solid like wood or clay. It seems that sometimes people release the tension they pick up during the day through these kriyas or shaking at night, and it is good to allow them the time to release. You are fortunate that they do not wake you up.
Some people do spontaneous healing when there is so much energy in their hands.
Most yogis would tell you this is another distraction from the spiritual path. But if you feel it may be a calling for you, you might wish to study with Barbara Brennan, a hands-on healer who has written several books, or with Roslyn Bruyere, another healer and author, or with others who know this field. Healing can be a distraction that hooks ego and keeps you from further development on the path, but it seems to be a calling for some people. I do not think it is healthy unless you know you will not pick up other people s energy, unless you are convinced it does not come from you but rather from a higher source, and unless you have some training and a great deal of patience with others. Just putting your energy into someone else can create problems for them unless you have a sense of the best way to do this, and there are several systems that provide a structure that can help.