Created in 1993, the band recorded their first album, Le Bien-être et la Paix (Well-being and Peace), four years later.

[5] Finally, in 2007 with the departure of Olivier and arrival of Nicolas Savoury the band returned with 'Une somme de détails' (an addition of details).

[5] The album pushed Mass Hysteria back to its root of origin that made it a success.

The album's cover undeniably confirmed the band's renewed connection with 'contraddiction' (also in red and black).

In 2013, Mass Hysteria began La Tournée des ombres as part of the band's 20th anniversary and to promote their most recent album.

The tour for their album " Matière Noire " was 120 shows going all over France, Switzerland, Belgium, Quebec and Russia.