A Queens mother burned her 3-year-old son in scalding water because the toddler soiled himself, authorities said yesterday.

Regina Owens, 30, of Rockaway Park, flipped out after Barkim Owens soiled his pull-ups, cursing him, stripping him naked and holding him in the tub of burning-hot water while he screamed in agony, Queens DA Richard Brown said.

The child suffered second-degree burns to his legs buttocks and genitals, the DA said. Owens was awaiting arraignment last night and faces up to 25 years in prison if convicted.