A positive Candida indicates a Candida carrier or can be an occult infection, which can easily cause candidiasis when the body is immunocompromised or the microecological environment of the normal host site is dysregulated. Candida is a fungus that usually causes vaginitis. Candida can cause superficial skin mucosa and systemic infection, and infection of different parts can cause different diseases. In addition to vaginitis, skin candidiasis can also occur, and there can be candidal stomatitis, candidal vaginitis, candidal cystitis, candidal pyelonephritis, candidal meningitis, candidal bacteremia and biliary tract infection.