Meditation can be used as a type of lucid dreaming induction. To become better at lucid dreaming, it is necessary to focus the mind to some degree in order to be prepared prior to dreaming. Meditation is a very useful and effective way to prepare the mind. When you can focus your intentions, as meditation allows you to do, lucid dreaming is easier to induce.
The short answer is “No”, however, it also depends on your definition of “dangerous”.
Lucid dreaming is merely the realization that one is dreaming. That alone is not dangerous. People sometimes confuse lucid dreaming for other sleep activity such as astral projection or out of body experiences (OBE’s). Venturing beyond lucid dreaming may be considered as having more of a risk, but that is for another post. For this post, let us focus on lucid dreaming.
There are two main types of lucid dreaming. Active Lucid Dreaming is when the dreaming takes control of a dream and makes decisions that alters or guides the dream. Passive Lucid Dreaming is when the dreamer realizes they are dreaming, but continues to remain at the whim of the dream. In other words, the dream does not attempt to control the dream, but rather just witnesses the dream.
Smiling can help you to stay in your dream and allow you to keep lucid dreaming longer. It is something that has worked for me for years. Smiling releases endorphins and serotonin into the body which are “feel good” chemicals that help you relax. Sometimes the content of dreams can cause the dream to become afraid or excited which releases adrenaline into the body which can easily cause the dreamer to awaken.