The short answer: warm water does most of the work, and the inside takes care of itself. Whether you have a vulva or a penis, the key principle is the same. Clean the external skin gently, avoid harsh products, and let your body handle the rest. The details vary by anatomy, so here’s what actually matters for each.
Why the Inside Doesn’t Need Your Help
If you have a vagina, it’s a self-cleaning organ. About 95% of the bacteria inside it are lactobacilli, a beneficial species that produces lactic acid and hydrogen peroxide. These keep the vaginal pH between 3.8 and 4.2, which is acidic enough to suppress harmful bacteria and yeast on its own. Washing inside the vaginal canal, whether with water, soap, or a douching product, disrupts this ecosystem and can cause the very problems you’re trying to prevent.
The vagina (the internal canal) and the vulva (everything on the outside, including the labia, clitoris, and the openings to the urethra and vagina) are two different structures. Cleaning applies only to the vulva. Anything beyond that boundary is territory your body already manages.
How To Clean the Vulva
Warm water alone is enough for most people. If you prefer using a cleanser, choose one that is fragrance-free, dye-free, and has a slightly acidic pH between 3.5 and 4.5. Standard bar soap and body wash tend to be too alkaline, which can dry out the tissue and shift the pH enough to invite irritation or infection. Fragranced products are one of the most common triggers for vulvar irritation, especially if you’re prone to yeast infections.
When you wash, gently clean between the folds of the labia where sweat, dead skin cells, and discharge can collect. Rinse thoroughly and pat dry rather than rubbing. That’s the whole routine. You don’t need specialized wipes, deodorant sprays, or “feminine hygiene” products. Many of them contain the very chemicals (fragrances, preservatives, dyes) that gynecologists specifically recommend avoiding.
How To Clean the Penis
If you’re circumcised, washing with mild soap and warm water during a regular shower is sufficient. If you’re uncircumcised, gently pull the foreskin back and wash underneath with mild soap and water. This removes smegma, the whitish buildup of dead skin cells and natural oils that collects under the foreskin. Cleaning under the foreskin once or twice a week is generally enough, though daily rinsing with water is fine too.
Never force the foreskin back if it doesn’t retract easily. In some cases, a tight foreskin (phimosis) makes retraction painful or impossible, which can lead to significant smegma buildup and increases infection risk. If this is your situation, a doctor can recommend treatments ranging from topical creams to minor procedures. Also avoid inserting cotton swabs or any objects into the urethral opening.
Why Douching Is Harmful
Douching (flushing the inside of the vagina with water or a solution) remains surprisingly common despite decades of evidence against it. Women who douche once a week are five times more likely to develop bacterial vaginosis (BV) than women who don’t douche at all. If you already have a vaginal infection without knowing it, douching can push that bacteria upward into the uterus, fallopian tubes, and ovaries, potentially causing pelvic inflammatory disease.
The instinct to douche usually comes from noticing odor or discharge. But both of those are normal in healthy amounts, and douching only makes them worse long-term by killing off the protective bacteria that were keeping things in balance.
What Normal Odor Actually Smells Like
All healthy vaginas have a mild odor, and it shifts throughout the month. A slightly sour or tangy smell, similar to sourdough bread, is a sign of lactobacilli doing their job. A faintly sweet or bittersweet scent, like molasses, can indicate a slight pH shift and is usually harmless. During your period, a metallic smell (like copper) is completely normal. An ammonia-like smell often just means there’s urine residue on the vulva or that you’re dehydrated. A skunky or body-odor scent can show up during periods of stress, when sweat glands in the groin are more active.
What isn’t normal: a strong, unfamiliar, fishy smell that persists for several days. That pattern, especially paired with grayish-white discharge, is a hallmark of bacterial vaginosis. Greenish-yellow discharge with an unusual odor points toward trichomoniasis, a sexually transmitted infection. Both are treatable, but neither will resolve with better washing alone.
Wiping Direction Matters
After using the toilet, always wipe from front to back. The bacteria that cause urinary tract infections (UTIs), primarily E. coli, live in the gastrointestinal tract. Wiping back to front drags those bacteria toward the urethra, where they can travel into the bladder. This is the single simplest habit for reducing UTI risk, and it applies every time, not just after a bowel movement.
Hygiene After Sex
Sexual activity pushes bacteria toward the urethra, which is why UTIs after sex are so common. Urinating shortly after intercourse flushes bacteria out of the urethra before they can travel upward. You don’t need to rush to the bathroom the second you’re done, but don’t wait hours either. A gentle external rinse with warm water afterward is fine, but skip the soap internally. Douching after sex does not prevent pregnancy or infections and carries the same risks as douching at any other time.
Underwear and Moisture Control
Cotton underwear is the best choice for everyday wear. Cotton breathes well and wicks away the moisture that bacteria and yeast thrive on. Synthetic fabrics trap heat and sweat against the skin, creating the warm, damp environment that promotes infections. Some synthetic underwear includes a cotton crotch panel, but that small strip doesn’t fully protect you from the surrounding fabric and won’t breathe the way 100% cotton does.
Change out of wet swimsuits and sweaty workout clothes as soon as you reasonably can. Sitting in a prolonged warm, moist environment around the genitals is one of the more common triggers for yeast infections and bacterial overgrowth. Sleeping without underwear or in loose-fitting shorts can also help by giving the area airflow overnight.