Which condition is characterized by a thin, watery, grey-white discharge and a fishy odor?

Bacterial vaginosis is characterized by a thin, watery, grey-white discharge accompanied by a fishy odor. This condition arises from an imbalance in the normal bacterial flora of the vagina, specifically a decrease in lactobacilli and an overgrowth of other types of bacteria. The fishy odor is particularly notable after sexual intercourse or during menstruation and is caused by the release of amines from the overgrowth of these bacteria.

In contrast, conditions like candida vulvovaginitis typically present with a thick, clumpy discharge and often itchiness, while trichomoniasis can cause a frothy yellow-green discharge that is often associated with irritation. Pelvic inflammatory disease presents with more systemic symptoms such as pelvic pain, fever, and is not primarily characterized by a distinct type of discharge. Understanding these distinctions is crucial for diagnosis and appropriate treatment.