Chapter 37: Vaginal Discharge & Itching Assessment

Vaginal Discharge & Itching Assessment details the diagnostic reasoning process, beginning with a focused patient history to distinguish between infectious etiologies like Trichomonas vaginalis, Candida species, and bacterial vaginosis (BV), and non-infectious causes such as atrophic vaginitis, chemical irritants, or retained foreign bodies. Significant attention is given to the physical examination, including the inspection of the external genitalia for lesions associated with sexually transmitted infections (STIs) like Herpes Simplex Virus (HSV), Human Papillomavirus (HPV) causing genital warts, and syphilis chancres. The text elaborates on the internal speculum examination to assess vaginal mucosa characteristics—such as the friable "strawberry cervix" of trichomoniasis or the pale, thinned walls of atrophic vaginitis—and the bimanual examination to rule out Pelvic Inflammatory Disease (PID) through signs like cervical motion tenderness. A core component of the chapter is the interpretation of point-of-care diagnostic studies, particularly the microscopic evaluation of wet mounts and Potassium Hydroxide (KOH) preparations to identify clue cells, motile trichomonads, or fungal hyphae. It also covers the utility of the "whiff test" for amine odors and the clinical significance of vaginal pH levels, noting that normal secretions are acidic with a pH (lesser than) 4.5, while conditions like BV and trichomoniasis typically present with a pH (greater than) 4.5. Furthermore, the summary addresses modern molecular testing and nucleic acid amplification tests (NAATs) for confirming Chlamydia trachomatis and Neisseria gonorrhoeae, emphasizing the importance of screening for co-infections. The chapter concludes by reviewing specific management considerations for diverse populations, including pediatric concerns regarding sexual abuse and foreign bodies, as well as the impact of estrogen deficiency in postmenopausal women.