Keeping your penis smelling fresh comes down to a few straightforward habits: daily washing with the right technique, wearing breathable fabrics, and staying hydrated. Most genital odor is caused by sweat mixing with bacteria on the skin’s surface, or by a buildup of dead skin cells and oils under the foreskin. Both are easy to manage once you know what works and what to avoid.
Why Odor Builds Up
Your groin is packed with apocrine sweat glands, the same type found in your armpits. These glands are connected to hair follicles, and when their sweat mixes with bacteria living on your skin, the result is a noticeable smell. The warm, enclosed environment of the groin area accelerates this process, especially on hot days or after physical activity.
If you’re uncircumcised, there’s an additional factor. The space beneath the foreskin creates a low-oxygen environment that’s hospitable to anaerobic bacteria. Research has shown that uncircumcised men carry a higher presence and abundance of these bacteria compared to circumcised men. That bacterial population, combined with a substance called smegma (a mix of skin oils, dead skin cells, and sweat), is a common source of stronger odors.
How to Wash Properly
A gentle daily wash is the single most effective thing you can do. If you’re uncircumcised, carefully pull the foreskin back as far as it comfortably goes and clean underneath with water or a mild soap. Wipe away any visible smegma buildup, then rinse thoroughly. You don’t need to scrub. The skin on the glans is sensitive, and aggressive cleaning can cause irritation that actually makes odor problems worse.
If you’re circumcised, washing the entire penis with mild soap and water is sufficient. Either way, pat the area dry with a clean towel afterward rather than rubbing. Moisture left behind encourages bacterial growth. If you’re uncircumcised, slide the foreskin back into its normal position before getting dressed.
If you notice a lot of smegma or a persistent smell, wash more than once a day, particularly after exercise or heavy sweating.
Choosing the Right Soap
Not all soaps are safe for genital skin. Traditional bar soap strips away the natural oils that protect the skin’s surface, which can lead to dryness and micro-cracks. Bacteria then settle into those cracks, potentially causing itching, soreness, and more odor rather than less.
Look for products labeled “fragrance-free,” “hypoallergenic,” or “for sensitive skin.” Avoid anything with perfumes, dyes, or alcohol. A mild, unscented liquid wash is your best option.
Products to Avoid
It’s tempting to use deodorants, body sprays, or scented wipes to mask odor, but these products cause more harm than good on genital skin. Sexual health specialists specifically recommend against spraying deodorant or any fragranced product directly onto the area. Wet wipes designed for general use are also a poor choice because adult genital skin is more reactive than the baby skin those products were formulated for.
Be careful in the shower, too. Don’t let shampoo or conditioner run down onto your genitals. Bubble baths, essential oils, and heavily fragranced shower gels can all irritate the skin and disrupt its natural balance. Even your laundry matters: fabric softeners and two-in-one detergent products leave chemical residues on underwear that transfer to genital skin throughout the day, causing dryness and irritation.
Underwear Makes a Bigger Difference Than You Think
Cotton is the best fabric for underwear if odor is a concern. It’s breathable, wicks away moisture, and creates a less favorable environment for bacteria and yeast. Synthetic fabrics trap heat and sweat against the skin, which is exactly what odor-causing bacteria thrive on.
Some synthetic underwear includes a small cotton panel in the crotch, but that partial solution doesn’t fully protect you from the moisture-trapping properties of the surrounding fabric. Go with 100% cotton when possible, and change your underwear daily, or more often if you’ve been sweating heavily. Putting on clean, breathable underwear after washing is one of the simplest ways to stay fresh throughout the day.
How Diet and Hydration Affect Smell
What you eat and drink influences your body odor everywhere, including your groin. Garlic and onions can boost metabolism and body heat in some people, increasing sweat production and giving bacteria more to work with. Asparagus contains a compound that your body converts into sulfur-based chemicals, which is why your urine can smell strongly after eating it. That smell lingers in the groin area, too.
Hydration is one of the easiest dietary changes you can make. Drinking plenty of water helps flush out compounds that contribute to body odor. Aim for at least eight glasses a day, and more if you’re active or live in a warm climate. Concentrated, dark yellow urine has a stronger smell than diluted urine, so staying hydrated reduces residual odor after urination as well.
When Odor Signals Something Else
Normal genital odor is mild and manageable with good hygiene. A strong, fishy, or unusually foul smell that doesn’t improve with regular washing could point to a bacterial or fungal infection. Redness, itching, unusual discharge, or pain during urination alongside persistent odor are signs worth getting checked by a healthcare provider. Sexually transmitted infections and skin conditions like balanitis (inflammation of the glans) can both produce noticeable odor changes that hygiene alone won’t resolve.