'Love & Hip Hop' Star Yung Berg -- Arrested for GF Attack ... Obstruction of Breathing

Yung Berg -- the rapper who stars on "Love & Hip Hop Hollywood" -- was arrested in NYC early Wednesday for allegedly brutalizing his girlfriend, and the charge is "obstruction of breathing" ... TMZ has learned.

Berg -- aka Hitmaka -- and the woman were at the Gershwin Hotel when they got in an argument ... where he allegedly grabbed her by the neck, threw her to the floor, dragged her by her hair and hit her in the face.

Apparently, the neck grab was enough for the breathing obstruction charge.

When cops came, the woman had bruises and complained she was in pain.

He's currently in custody.