The best option for washing your private area is either plain warm water or a mild, pH-balanced cleanser specifically designed for intimate use. Regular bar soap and scented body washes are too alkaline and too harsh for genital skin, which is thinner, more absorbent, and more easily irritated than skin elsewhere on your body. The American College of Obstetricians and Gynecologists recommends plain warm water for vulvar cleansing, noting that soaps and detergents can disrupt the normal balance of organisms in that area.
Why Regular Soap Causes Problems
Most bar soaps have a pH between 9 and 11. The vulvar area sits at a pH of around 4 to 5, and the internal vagina is even more acidic, ranging from 3.8 to 5.0 in women of reproductive age. That gap matters. Repeated washing with alkaline soap strips the protective lipids and proteins from the outermost layer of skin, increases water loss, and leaves the area dry, irritated, and vulnerable to infection. One review of vulvar hygiene practices concluded bluntly that bar soap, given its strong alkalinity and lipid-depleting power, is “certainly the wrong product for female intimate hygiene.”
The damage isn’t just to the skin surface. Research on vaginal washing with soap and water found it reduced detection of beneficial Lactobacillus bacteria by roughly 44%. The species hit hardest was L. crispatus, the one most consistently linked to optimal vaginal health and lower risk of infections. When these protective bacteria decline, the pH rises above 4.5, creating conditions that favor bacterial vaginosis and other infections.
What to Use Instead
If water alone doesn’t feel sufficient, look for a product labeled as a “syndet” (synthetic detergent) or pH-balanced intimate wash. Unlike traditional soap, syndets have a mild detergent effect without stripping the skin’s natural oils or disrupting the local microbiome. They’re formulated at a lower pH that matches the genital area. Studies comparing the two found that syndets preserve the skin’s protein and lipid barrier while still cleaning effectively, and they promote hydration rather than drying the skin out.
Some intimate washes contain lactic acid, which is the same acid naturally produced by Lactobacillus bacteria in the vaginal area. A wash with a small concentration of lactic acid helps maintain the acidic environment that keeps harmful bacteria in check. In a 28-day clinical trial, a 2% lactic acid intimate wash was well tolerated and supported the vulvar microbiome.
Whatever product you choose, it should be:
- Fragrance-free. Fragrances are the single most common allergen in vulvar skin reactions, triggering positive allergy responses in over 37% of patients tested in one study, with 60% of those reactions clinically relevant to vulvar symptoms.
- Preservative-free or minimally preserved. Preservatives were the second most common trigger, particularly a chemical called methylisothiazolinone, which caused reactions in nearly 18% of patients tested.
- Free of dyes, antibacterial agents, and strong surfactants. Anionic surfactants (the foaming agents in many body washes) are especially irritating and weaken the skin barrier.
Where to Wash and Where Not To
This is the distinction that trips most people up. External washing only. For women, that means the vulva: the outer and inner labia, the clitoral hood, and the perineum. You never need to wash inside the vagina. The vagina is self-cleaning, and introducing any soap, water, or douche internally disrupts the Lactobacillus bacteria that maintain its acidic, infection-resistant environment. Douching has been repeatedly linked to bacterial vaginosis and increased infection risk.
For men, gently wash the shaft, the area beneath the foreskin (if uncircumcised), and the tip of the penis. Water alone is sufficient under the foreskin. A gentle soap is fine on surrounding skin, but using too much can cause irritation. Don’t scrub, as the skin here is sensitive.
How Often to Wash
Once daily is the medical consensus, ideally after a bowel movement when feasible. Twice daily is reasonable if you have multiple bowel movements per day or heavy sweating, but more frequent washing than that starts to impair the skin’s microenvironment and can actually cause the itching and irritation you’re trying to prevent. The Royal College of Obstetricians and Gynaecologists specifically advises cleaning the vulvar area only once a day for women with vulvar skin conditions.
Use lukewarm water, not hot. Pat dry with a clean towel rather than rubbing. Avoid washcloths or loofahs on genital skin, as these create friction and can harbor bacteria.
Products and Ingredients to Avoid
Beyond standard bar soap, several common products are poor choices for genital hygiene:
- Bubble bath and bath bombs. These contain alkaline surfactants and fragrances that sit against the skin for extended periods.
- Scented body wash. Even “sensitive skin” body washes often contain fragrance or preservatives that irritate genital tissue.
- Antibacterial soap. These contain harsh active ingredients that don’t distinguish between harmful and protective bacteria.
- Feminine deodorant sprays and wipes. These frequently contain fragrances and preservatives linked to contact dermatitis.
If you notice persistent itching, burning, unusual discharge, or a strong odor that doesn’t resolve with basic hygiene, those are signs of an underlying condition like bacterial vaginosis, a yeast infection, or contact dermatitis rather than a cleanliness issue. Switching to a harsher product will make things worse, not better. The simplest approach, warm water and at most a fragrance-free, pH-balanced wash, is also the one best supported by evidence.