Like Oliver Müller, around 20,000 Germans suffer from facial paralysis every year - facial paralysis.

You can no longer smile and often speak indistinctly because the corner of your mouth on the affected side hangs down.

Close your mouth, frown, close your eyes - everything that is taken for granted suddenly no longer works.

The reason: the facial nerve is paralyzed.

Andreas Kehrer, specialist in plastic, aesthetic and reconstructive surgery, explains what is behind it and what happens after the diagnosis.