Yellowish leucorrhea at any period of time is an abnormality because normal leucorrhea is milky white with no odor or only a faint fishy smell, and the amount is not too much. The common clinical causes of yellowing leucorrhea are as follows: 1. Inflammation of the vagina itself leads to a change in the color of the secretions, if it is bacterial vaginosis, trichomonas vaginitis or miscellaneous bacterial infection, it may cause the phenomenon of yellowing leucorrhea. 2. caused by the local inflammation of the cervix. 3, because of the pelvic inflammation, when the pelvic inflammation often exudation will increase, so there will be repeated lower abdominal pain, and also appear the phenomenon of yellowing leucorrhea.