Extra vaginal discharge is usually caused by something perfectly normal: where you are in your menstrual cycle, sexual arousal, pregnancy, or hormonal birth control. Everyone produces different amounts on any given day, and some fluctuation is expected. Healthy discharge is clear, milky white, or off-white, has little to no smell, and can range from watery to thick and pasty. If your discharge has changed only in amount but still looks and smells the way it usually does, there’s a good chance nothing is wrong.
That said, a sudden increase paired with a new color, texture, or odor can signal an infection worth addressing. Here’s how to sort through the most common reasons.
Your Menstrual Cycle Changes Discharge Daily
Estrogen is the main driver behind how much discharge you produce, and estrogen levels shift dramatically across a typical 28-day cycle. In the days right after your period, discharge tends to be minimal, dry, and tacky. Between days 4 and 9, it gradually becomes stickier and creamier, with a cloudy, yogurt-like consistency. Then, around days 10 to 14, as ovulation approaches, estrogen peaks. This is when discharge hits its highest volume: wet, slippery, and stretchy, often compared to raw egg whites. That texture exists for a biological reason. It creates an easier path for sperm to travel.
After ovulation, estrogen drops and progesterone takes over, which dries things up considerably. From roughly day 15 until your next period, discharge becomes scant or nearly absent. So if you’re noticing more discharge than usual, check where you are in your cycle. Mid-cycle surges are one of the most common explanations.
Pregnancy and Hormonal Birth Control
Pregnancy triggers a sustained rise in estrogen, and with it, a noticeable increase in discharge that can start early and continue throughout all three trimesters. This extra discharge serves a protective role: it helps prevent infections from traveling up into the uterus. Normal pregnancy discharge is thin, clear or milky white, and shouldn’t smell unpleasant. Toward the very end of pregnancy, the volume increases even further, and in the final week or so you may notice streaks of sticky, jelly-like pink mucus as the body prepares for labor.
Hormonal birth control pills can have a similar, though milder, effect. Because they alter estrogen and progesterone levels, they can increase or decrease your baseline discharge. If you recently started, stopped, or switched contraceptives and noticed a change, that’s likely the connection.
Sexual Arousal
During arousal, blood flow to the genitals increases significantly. This causes fluid to seep through the vaginal walls, a process called transudation, along with secretions from glands near the vaginal opening. The result is additional lubrication that can look and feel like a sudden increase in discharge. This is a normal physiological response, not a sign of excess production, and it resolves on its own after arousal passes.
Infections That Change Your Discharge
When increased discharge comes with a shift in color, smell, or texture, an infection is the most likely cause. Three are especially common.
Bacterial Vaginosis
Bacterial vaginosis (BV) happens when the balance of bacteria in the vagina tips away from the protective species and toward harmful ones. The hallmark is a thin, uniform, gray-white to yellowish discharge with a noticeable fishy odor. It also raises vaginal pH above its normal acidic range. BV is the most common vaginal infection in people of reproductive age and often develops after douching, using scented soaps internally, or other disruptions to the vaginal environment.
Yeast Infections
A vaginal yeast infection produces thick, white, clumpy discharge that’s often described as looking like cottage cheese. Unlike BV, it typically has little or no odor. The more recognizable symptoms are intense itching and irritation of the vulva, burning during urination or sex, and redness or swelling around the vaginal opening. Yeast infections can follow antibiotic use, since antibiotics can wipe out the bacteria that normally keep yeast in check.
Trichomoniasis
Trichomoniasis is a sexually transmitted infection caused by a parasite. It produces a thin, frothy, yellow or green discharge with a foul smell. Not everyone with trichomoniasis has obvious symptoms, but when they appear, the discharge is usually distinct enough to differentiate from BV or a yeast infection. Chlamydia and gonorrhea can also increase discharge, though their symptoms are often subtler or absent entirely, which is why routine STI screening matters.
Products That Disrupt Your Vaginal Balance
The vagina maintains its own ecosystem of beneficial bacteria, primarily lactobacilli, which keep the pH acidic and hostile to harmful organisms. Douching, using scented soaps, shower gels, or fragranced wipes internally disrupts this balance. It kills off protective bacteria, raises the pH, and creates conditions where infections like BV can take hold. The resulting infection then causes the increase in discharge, not the product itself.
This is a cycle that reinforces itself: the discharge from an infection prompts more douching, which worsens the imbalance. The vagina is self-cleaning. Water on the external vulva is sufficient for hygiene. Products marketed for internal vaginal cleansing cause more problems than they prevent.
What the Color and Texture Tell You
If your discharge is clear, white, or off-white with no strong odor, the increase is almost certainly hormonal or related to arousal, regardless of texture. The following changes, however, point toward something that may need treatment:
- Gray or off-white with a fishy smell: consistent with bacterial vaginosis
- Thick, white, and clumpy with itching: consistent with a yeast infection
- Yellow or green, thin and frothy, foul-smelling: consistent with trichomoniasis or another STI
- Brown or blood-tinged outside your period: could be spotting from hormonal changes, but worth investigating if it persists
A sudden change in amount alone, even without a color or odor shift, can still be worth paying attention to if it doesn’t correspond to any of the normal causes listed above. Tracking your cycle for a month or two often reveals whether the pattern is predictable or truly new.