People dream about what it would be like to travel inside their own bodies. Sometimes this is used as a relaxation exercise. Sometimes this is used as training to expand and strengthen your internal vision. You choose why and proceed.
If you ever watched the film, Innerspace, you may recall how the protagonist was shrunk into a microscopic state in order to travel through the human bloodstream. The special effects photography was kid of cool for the era it was released. This protagonist had his own agenda for internal body travel. Youa re already defining your own.
You can take the above example to heart. Imagine yourself as a tiny spark of light that chooses to flow through different parts of yoru body. Allow yourself to feel the energy, the tension and other sensations as you learn to release them.
Much like the Innerspace film or the Bodywars ride at Epcot Centre in Orlando, Florida, you visualize the organs of the human body all around you. Remind yourself what each organ feels like. What does the appearance teach you? In order to reconnect with your dreams, it is necessary to reconnect with your core self on other levels. How do you feel at this moment?