Leukorrhea (vaginal discharge)

Overview

Vaginal discharge is fluid and mucus produced by the vagina and cervix. Normal discharge helps keep tissues moist and contributes to the vaginal environment that protects against infection. “Leukorrhea” is an older descriptive term and should not be treated as a diagnosis on its own. Normal discharge can be clear or white, thick and sticky at some times and more slippery around ovulation. ^{[1] [2]}

Hormonal changes alter cervical mucus and vaginal secretions across the menstrual cycle, during pregnancy, with sexual activity and with some forms of contraception. The vaginal microbiome also influences odor and acidity. Infection, inflammation, hormonal deficiency, irritation or a retained foreign body can change the amount, color, consistency and smell of discharge. ^{[1] [2]}

A normal variation requires reassurance rather than antimicrobial treatment. Evaluation becomes more important when discharge is new for the person, has a strong or unpleasant odor, turns yellow, green or blood-stained, becomes curdy or frothy, or occurs with itching, pelvic pain, dysuria, fever, sores or bleeding. Recent sexual exposure and pregnancy change the differential diagnosis and testing plan. ^{[1] [2] [3]}

Symptoms and warning signs

Normal discharge is often clear or white without a strong unpleasant smell. It may become wetter around ovulation and more abundant in pregnancy. Abnormal patterns can include fishy odor, thick white curd-like discharge, yellow-green or frothy discharge, or discharge accompanied by vulvar irritation, burning, painful sex or urinary discomfort. ^{[1] [2]}

Seek prompt care for discharge with fever, significant pelvic or lower-abdominal pain, pregnancy with bleeding or concerning watery fluid leakage, heavy bleeding, severe pain or marked systemic illness. Those features may indicate pelvic inflammatory disease, obstetric complications or another diagnosis that should not be self-treated as “leukorrhea.” ^{[1] [2]}

Diagnosis

Assessment begins with the pattern, duration, menstrual and pregnancy status, medications, hygiene products, sexual history and associated symptoms. Examination can assess vulvar inflammation, vaginal discharge and the cervix. The need for pelvic examination depends on age, pregnancy, severity and the suspected diagnosis. ^{[1] [2]}

Testing is targeted rather than universal. Vaginal pH, microscopy or point-of-care tests can help distinguish bacterial vaginosis, candidiasis and trichomoniasis. NAAT can test for trichomonas, chlamydia and gonorrhea when indicated. Pregnancy testing, urinalysis or other studies may be appropriate depending on symptoms. ^{[1] [2] [3]}

Normal physiologic discharge is common. Other causes include bacterial vaginosis, vulvovaginal candidiasis, trichomoniasis, chlamydial or gonococcal cervicitis, hormonal changes around menopause, irritant or allergic vaginitis, dermatologic disease and a retained tampon or other foreign body. The appearance of discharge alone is not sufficiently specific to identify the cause. ^{[2] [3]}

Causes, risk factors and clinical context

Changes in sexual partners can increase STI risk, while antibiotics, diabetes and pregnancy can predispose to candidiasis. Douching and scented intravaginal products can disrupt the normal environment and cause irritation. Menopause and breastfeeding can reduce estrogen and cause dryness or inflammatory symptoms rather than the classic physiologic leukorrhea pattern. ^{[1] [2]}

Physiologic discharge fluctuates and requires no treatment. Infectious causes generally improve when the specific infection is correctly identified and treated. Recurrent symptoms should prompt confirmation of the diagnosis rather than repeated empiric treatment because recurrent “thrush” or “BV” symptoms can have another cause. ^{[1] [2] [3]}

Complications and why the diagnosis matters

The discharge itself does not cause complications. Complications come from an untreated underlying condition, such as pelvic inflammatory disease from cervicitis, pregnancy complications associated with certain infections, or persistent inflammation. Unnecessary antimicrobial treatment can also cause side effects and disrupt normal vaginal flora. ^{[1] [2]}

Normal discharge has an excellent prognosis because it is a physiologic function, not an illness. Most common infectious causes are treatable, but recurrence is common for some conditions. Persistent, unexplained, bloody or postmenopausal discharge requires further assessment to exclude less common causes. ^{[1] [2] [3]}

Treatment and management

Treat the cause, not the appearance of discharge. Bacterial vaginosis, candidiasis and trichomoniasis use different antimicrobial regimens, while chlamydia or gonorrhea requires STI-specific therapy and partner management. Physiologic leukorrhea requires reassurance and gentle external hygiene rather than medication. ^{[1] [2]}

Wash the external vulvar area gently with water and mild non-perfumed products if needed. Avoid douching, perfumed gels, deodorants and scented wipes because they can irritate tissue and alter the vaginal environment. Breathable underwear and changing out of wet clothing can improve comfort, but they do not substitute for treatment of infection. ^{[1] [2] [3]}

Do not diagnose an infection solely from discharge color or odor and do not repeatedly use over-the-counter antifungals without reassessment when symptoms recur or differ from prior episodes. Pregnancy changes medication choices, and some vaginal treatments should be discussed with a clinician or midwife. ^{[1] [2]}

Follow-up, recovery and prevention

Follow-up depends on the cause. STI diagnoses require partner and retesting plans according to the infection. Recurrent bacterial vaginosis or candidiasis may need a longer diagnostic and treatment strategy. Persistent unexplained discharge, bleeding after sex or postmenopausal symptoms should be reassessed even if initial infection tests are negative. ^{[1] [2]}

There is no reason to prevent normal physiologic discharge. To reduce avoidable irritation, avoid douching and perfumed intravaginal products. Barrier protection and STI testing based on sexual risk reduce sexually transmitted causes. Good diabetes control and avoiding unnecessary antibiotics can help reduce recurrent candidiasis in susceptible people. ^{[1] [2] [3]}

Special situations and care pathway

Pregnancy normally increases thin clear or milky discharge. Green or yellow discharge, unpleasant odor, itching or pain should be discussed with a maternity clinician, and vaginal bleeding in pregnancy requires prompt advice. Sudden continuous watery leakage can represent rupture of membranes rather than normal discharge and needs obstetric assessment. ^{[1] [2] [3]}

First decide whether the discharge fits a normal physiologic pattern or has concerning changes. If abnormal, use history, examination and targeted testing to identify vaginitis, cervicitis, STI or noninfectious causes. Treat the confirmed or strongly suspected cause and plan follow-up when recurrence, pregnancy or STI risk is present. ^{[1] [2]}

When to seek urgent medical care

Seek urgent or same-day assessment for discharge with severe pelvic pain, fever, significant bleeding, pregnancy with bleeding or possible fluid leakage, severe illness, or symptoms after sexual assault. These situations require a broader evaluation than routine vaginitis care. ^{[1] [2]}

Sources

1. NHS — Vaginal discharge
2. NHS — Vaginitis
3. NHS — Vaginal discharge in pregnancy

This article is based on trusted medical sources and is awaiting clinician review. It is not a substitute for personalized medical advice.