Vaginal discharge that’s clear, milky white, or off-white is normal. Everyone produces it daily, and its thickness changes throughout the menstrual cycle. Colors outside that range, like gray, yellow, green, or brown, usually signal something specific happening in your body, from a minor hormonal shift to an infection worth treating.
Clear to White Discharge
Clear or white discharge is the baseline. Your body produces it to keep vaginal tissue moist and to flush out bacteria. The amount varies from person to person, and factors like birth control pills, ovulation, and pregnancy all influence volume. Around ovulation (roughly mid-cycle), discharge often becomes extra slippery and wet, similar in texture to raw egg whites. This is completely normal and a sign your body is functioning as expected.
White discharge becomes worth paying attention to when the texture changes. A thick, clumpy discharge that looks like cottage cheese, especially with little or no odor, is the hallmark of a yeast infection. You’ll usually notice itching and irritation around the vaginal opening, and the surrounding skin may appear red or swollen. Yeast infections are extremely common and treatable with antifungal medication.
Gray or Off-White Discharge
Discharge that looks grayish or off-white and has a distinct fishy smell points toward bacterial vaginosis (BV). The fishy odor is the hallmark sign, and it often becomes more noticeable after sex. BV happens when the natural balance of bacteria in the vagina shifts, allowing certain types to overgrow. A healthy vagina maintains a pH between 3.8 and 4.5; BV pushes that pH higher, creating an environment where these bacteria thrive.
BV is not a sexually transmitted infection, though sexual activity can be a contributing factor. The discharge tends to be thin rather than thick, which helps distinguish it from a yeast infection. BV requires antibiotics to clear, and it’s worth getting treated because untreated BV can increase susceptibility to other infections.
Yellow or Green Discharge
A yellowish or greenish discharge, particularly if it’s thin, frothy, or has an increased volume with a fishy smell, can indicate trichomoniasis. This is a sexually transmitted infection caused by a parasite, and it’s one of the most common curable STIs. Along with the color change, you may notice itching, burning, redness, or discomfort when urinating.
Not all yellow discharge means an STI. A very pale yellow can sometimes be normal, especially if it dries slightly on underwear. The concern increases when the color is vivid or distinctly green, when it’s accompanied by a strong odor, or when you have other symptoms like genital soreness. Other STIs, including chlamydia and gonorrhea, can also cause unusual discharge, though their discharge may be less distinctly colored and easier to overlook.
Pink Discharge
Pink discharge is blood mixed with normal discharge, and the cause depends on timing. In the few days before your period starts, pinkish-brown discharge is common as your body prepares for menstruation. You may also see it at the tail end of a period as the last traces of blood mix with regular discharge. Fresh blood appears pink or red, while older blood looks darker.
Mid-cycle pink spotting can be ovulation bleeding. This happens when the ovary releases an egg, roughly 14 days before your next period, and it’s usually very light. Some people also experience mild cramping alongside it. If you’re trying to conceive, light pink spotting around when you’d expect your period could be implantation bleeding, which occurs when a fertilized egg attaches to the uterine wall. Implantation bleeding is typically faint and short-lived.
Brown Discharge
Brown discharge is almost always old blood. Blood turns brown as it oxidizes, so any bleeding that takes time to exit the body will look brownish rather than red. The most common scenario is spotting before or after your period. This is normal and not a sign of a problem on its own.
Brown discharge that shows up outside your period window, persists for more than a couple of days, or occurs after menopause warrants attention. In rare cases it can signal cervical or uterine issues that benefit from early evaluation.
Discharge Changes During Pregnancy
Pregnancy increases discharge volume noticeably. This is called leukorrhea, and it’s typically thin, white, and mild-smelling. Your body ramps up production to help prevent infections from reaching the uterus. Throughout pregnancy, a thick mucus plug seals the cervical opening as an additional barrier against bacteria.
In the late third trimester, that mucus plug can begin to move into the vagina, causing a noticeable increase in discharge that may be clear, pink, or slightly bloody. This can happen days before labor or right at its onset. Heavy vaginal bleeding during pregnancy, anything as heavy as a typical period, is a different situation and needs immediate medical attention.
Non-Infection Causes of Unusual Discharge
Not every change in discharge means an infection. Contact irritation from everyday products can inflame vulvar skin and cause fluid to seep out, which is easy to mistake for abnormal vaginal discharge. Common irritants include perfumed soaps, scented pads or tampons, fabric softeners, laundry detergents, feminine hygiene sprays, and even the lubricant or spermicide on some condoms. Nylon underwear and pantyhose can also contribute by trapping moisture against the skin.
If your discharge changed around the same time you switched soaps, detergents, or started using a new product, removing that product for a few weeks is a reasonable first step. Switching to unscented, gentle products and wearing cotton underwear often resolves the issue without any medical treatment.
Signs That Need Medical Evaluation
Color alone isn’t always enough to determine what’s going on. A medical history by itself has been shown to be insufficient for accurately diagnosing vaginal infections, which is why clinicians use pH testing and microscopic examination of discharge samples to identify the specific cause. In practical terms, this means self-diagnosing based on color can lead you to the wrong over-the-counter treatment.
Specific combinations of symptoms that point toward something worth evaluating include discharge paired with pelvic pain, bleeding between periods or after sex, pain during urination, itching or soreness, and blisters or sores. A sudden change in color, smell, or texture that doesn’t match anything in your usual cycle pattern is also a reliable signal. If you’ve treated what you assumed was a yeast infection with over-the-counter medication and symptoms haven’t resolved within a few days, the cause is likely something different.