Practicing breathwork opens the door to experiencing various sensations in both the body and mind, depending on the type of breathing technique you are practicing.
Breathwork quiets your mind and allows you to experience more clarity, creativity and alertness. It calms down your body and releases tension from the muscles. You can also feel tingling sensations throughout your body, you can start to move and shake, sometimes muscles can even contract temporarily, due to the changed CO2 levels in the blood. Breathwork can also provoke emotional releases, varying from crying to laughing and everything in between.
With all sensations you might experience during a session, do remember that this is completely ok and natural. Moreover, you are always in control of your own breath. If you start feeling overwhelmed in any way, simply return to your natural way of breathing.