'Married To Medicine' Revelations of Shady Pasts Lead to Violent Fight

11/7/2014 12:40 AM PST

'Married To Medicine' Fight -- Revelations of Shady Pasts Lead to Violent Fight

A business meeting gone bad between 2 stars of "Married To Medicine" turned bloody ... after details exposed by dual background checks sparked an amazing catfight.

Sources close to production tell TMZ ... Quad Webb-Lunceford and Lisa Nicole Cloud were having a 1-on-1 about possibly going into business together ... when all hell broke loose.

We're told both ladies found out unsavory things about each other's past ... which caused 1 of them to hurl a glass of water in the other's direction. After that, it was go time -- with punches thrown and nails exposed ... resulting in Lisa scratching Quad in the face.

Quad had some facial injuries and went to the hospital to be examined. Both she and Lisa filed police reports.

As for what triggered the fight ... we're told each was pissed at all the dirt that was dug up in the personal background checks.