The main reasons for the gray color of the leucorrhea are as follows: 1. The normal leucorrhea is usually a colorless, odorless liquid, if there is gray leucorrhea, it is considered to be caused by the symptoms of vaginitis, after the trichomonas infection will lead to changes in the color of the leucorrhea, sometimes gray and sometimes yellowish white or yellowish green, and will be accompanied by a strong odor. 2. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things.