Differential Diagnosis for Yellow-Green Frothy Vaginal Discharge with Itching
- Single Most Likely Diagnosis
- Bacterial Vaginosis (BV): Characterized by a fishy odor, thin, white or gray discharge, but can sometimes present with yellow-green frothy discharge, especially if there's an overgrowth of anaerobic bacteria. Itching is a common symptom.
- Other Likely Diagnoses
- Trichomoniasis: A sexually transmitted infection caused by the parasite Trichomonas vaginalis, known for causing a greenish-yellow, frothy, and foul-smelling vaginal discharge, accompanied by itching and irritation.
- Vaginal Candidiasis (Yeast Infection): Typically presents with a thick, white, cottage cheese-like discharge and severe itching. However, in some cases, especially if the infection is complicated or mixed with a bacterial infection, the discharge can appear yellow-green.
- Do Not Miss Diagnoses
- Gonorrhea: A sexually transmitted infection that can cause a greenish or yellowish discharge, especially if it involves the cervix. Itching and pain during urination are common symptoms. Missing this diagnosis can lead to serious complications like pelvic inflammatory disease (PID).
- Chlamydia: Another sexually transmitted infection that can cause abnormal vaginal discharge, though it's often asymptomatic. It's crucial to consider due to the risk of PID and long-term fertility issues if left untreated.
- Rare Diagnoses
- Foreign Body: The presence of a foreign object in the vagina, such as a forgotten tampon, can cause a foul-smelling, possibly yellow-green discharge due to infection. Itching and discomfort are common.
- Desquamative Inflammatory Vaginitis (DIV): A rare condition characterized by a purulent, greenish-yellow discharge and significant vaginal inflammation. Itching and burning are prominent symptoms. The exact cause is unknown, but it's thought to be related to an autoimmune response or an allergic reaction.