  In this article, we show how asteroseismology and spectropolarimetry allow to
probe dynamical processes in massive star interiors. First, we give a summary
of the state-of-the-art. Second, we recall the MHD mechanisms that take place
in massive stars. Next, we show how asteroseimology gives strong constraints on
the internal mixing and transport of angular momentum while spectropolarimetry
allows to unravel the role played by magnetic fields.
