Masturbation itself doesn’t cause infections, and the centuries-old belief that it damages your health has long been discarded.1Psychological Medicine. Masturbatory insanity: the history of an idea, revisited Infections can follow from what touches the genitals along the way: hands, saliva, lube, toys or household objects. That makes most of the risk a matter of hygiene and product choice, which puts it largely in your control.
How Germs Get In During Solo Sex
Hands are the most common route. Skipping handwashing is linked to a higher risk of genital infections, and so is not drying the genital area afterward or drying it with a shared cloth.2Gynecology and Obstetrics Clinical Medicine. Intimate hygiene practices and reproductive tract infections: A systematic review
A good routine means soap and water for about 20 seconds, including under the nails, where bacteria and yeast collect. Do it before touching your genitals, and again if you touch your anus, a toilet surface or your phone partway through. Hand sanitizer is a poor stand-in when hands are visibly dirty, and alcohol gel can sting delicate genital skin.
The vagina normally defends itself well. Bacterial vaginosis (BV) is an overgrowth of the wrong vaginal bacteria that often causes a thin, fishy-smelling discharge. It hosts protective bacteria that keep it slightly acidic. When that balance is disrupted, yeast or the bacteria behind BV can overgrow, so most problems after masturbating come from upsetting this balance rather than from catching something new.
Direction matters too. Bacteria from the anal area are the most common cause of UTIs when they reach the urethra. Fingers or toys moved from the anus to the vagina or urethra without washing can carry them there, so wash your hands, or change the condom on a toy, before switching from anal to vaginal use. Peeing afterward may help flush the urethra, though the evidence for that is mostly theoretical.
Small skin breaks give germs another way in. Even minor trauma to genital skin can become an entry point for infection.3American Journal of Case Reports. Fournier Gangrene in an Immunocompetent Woman Following Minor Perineal Manipulation: A Case Report Rough handling, dry friction and long nails are worth avoiding. Keep nails short and smooth, because a jagged edge can scratch the thin skin of the vulva or the urethral opening. Tiny scratches are often invisible, and stinging when you pee or wash can be one sign of broken skin, though infections cause stinging too. If skin looks raw or cracked, give it a few days to heal before touching it again.
Saliva, Yeast Infections and BV
Women who had recently masturbated using saliva were more than twice as likely to get another yeast infection.4PubMed. Candida transmission and sexual behaviors as risks for a repeat episode of Candida vulvovaginitis A male partner masturbating with saliva in the past month was also linked to more repeat yeast infections in the woman.5PubMed. Candida transmission and sexual behaviors as risks for a repeat episode of Candida vulvovaginitis The mouth naturally carries yeast, so if you get recurring infections, swap saliva for a gentle lube.
Saliva is thin and dries quickly, so people keep adding more, and the mouth also hosts many bacteria that are not the vaginal kind that keep things balanced. A water-based lube without glycerin gives the same slipperiness without bringing mouth organisms to the genitals.
The three can feel alike, but there are differences. Yeast usually means itching and thick white discharge. BV usually means thin grey discharge with a fishy smell and little itching. A UTI usually means burning when you pee and needing to go often. Over-the-counter yeast treatment won’t fix BV, so a test helps if you’re unsure.
One episode doesn’t mean saliva is to blame. Yeast infections have many triggers, including antibiotics, high blood sugar, hormonal changes and tight, damp clothing. The research links saliva to repeat infections in some women, a pattern rather than proof that it caused any single flare. If you’ve had only one infection and use saliva rarely, it’s reasonable to simply switch and see whether things improve. If yeast infections return several times a year, see a clinician.
Which Lubes Can Raise Your Risk
Lubes differ in how concentrated they are compared with body fluids. Highly concentrated lubes damaged vaginal tissue models far more than less concentrated ones.6PubMed Central. Hyperosmolal vaginal lubricants markedly reduce epithelial barrier properties in a three-dimensional vaginal epithelium model A weakened lining could let viruses like HIV and herpes in more easily, though that comes from lab tissue, not people.7PubMed Central. Hyperosmolal vaginal lubricants markedly reduce epithelial barrier properties in a three-dimensional vaginal epithelium model Some concentrated lubes also harm the protective vaginal bacteria that keep the vagina acidic.8PubMed Central. Hyperosmolal vaginal lubricants markedly reduce epithelial barrier properties in a three-dimensional vaginal epithelium model
The reason is water. Body cells are comfortable in fluids close to their own concentration, so a very concentrated lube pulls water out of them. Cells that lose water shrink, and the outer layer of the lining can peel away, leaving it thinner. A thinner lining protects less, which is why the same product can be harmless on the skin outside yet harsh inside the vagina or rectum.
Ingredients are a useful clue. Lubes listing glycerin, propylene glycol or PEG-8 among the first four ingredients caused marked tissue damage in lab tests.9PubMed Central. Hyperosmolal vaginal lubricants markedly reduce epithelial barrier properties in a three-dimensional vaginal epithelium model KY Jelly, Astroglide and the spermicide gel Gynol II reduced tissue health in lab tests too.10PubMed Central. Is Wetter Better? An Evaluation of Over-the-Counter Personal Lubricants for Safety and Anti-HIV-1 Activity Silicone lubes showed no harm to the tissue in those same tests.11PubMed Central. Is Wetter Better? An Evaluation of Over-the-Counter Personal Lubricants for Safety and Anti-HIV-1 Activity
When you read a label, remember that ingredients are listed from most to least. Glycerin or glycol near the top suggests a concentrated product, and some brands state the concentration (osmolality) or “iso-osmolar” on the pack. One catch: silicone lube shouldn’t be used with silicone toys, because it can degrade them. Skip spermicide lubes as well. Products with nonoxynol-9 irritate the lining, and there’s no reason to use spermicide for solo sex. For recurring vaginal infections or irritation, silicone or balanced water-based lubes are recommended.12PubMed Central. Approach to lubricant use for sexual activity
The rectum deserves extra care. Its lining is a single thin layer of cells, far more delicate than outer skin, and small unnoticed tears are easy to cause. If you use the same lube for anal and vaginal play, choose a gentle one that suits the more delicate area.
Sex Toys and STIs
HPV was found on vibrators right after use by women who had vaginal HPV.13PubMed. A study of human papillomavirus on vaginally inserted sex toys, before and after cleaning, among women who have sex with women and men It was still detected up to 24 hours after standard cleaning.14PubMed. A study of human papillomavirus on vaginally inserted sex toys, before and after cleaning, among women who have sex with women and men
Standard washing removes visible dirt and many bacteria, but some viruses such as HPV are tougher and cling to surfaces. HPV also spreads through skin contact, not just fluids, so a toy that touched infected skin can carry it. That’s why a condom is a more dependable barrier than cleaning alone when a toy is shared.
Sharing is common and protection less so. Among women using toys with female partners in one group, about a third shared them and fewer than half always used condoms on them.15PubMed Central. Risk Behaviors for Reproductive Tract Infection in Women Who Have Sex with Women in Beijing, China Trichomoniasis, herpes and genital warts have been passed between women without male partners.16PubMed Central. Sexually transmitted infections in women who have sex with women Put a fresh condom on a toy for each person and each switch.
Use the condom properly: put it on before use, take it off afterward and throw it away, without turning it inside out onto your hands. Use a new one every time the toy moves between people, and between the anus and the vagina. Ridged or very large toys may be hard to cover well.
Material matters for cleaning. Non-porous materials like body-safe silicone, glass and stainless steel clean best. Jelly rubber and similar soft materials have microscopic pores that trap bacteria and fluids where soap can’t reach. Some soft toys also contain chemical softeners, and a strong smell or sticky surface is a sign the material is breaking down. If a porous toy can’t be sterilized, a condom on every use is the sensible compromise, or replace it with a non-porous one.
A toy only you use won’t give you an STI you don’t already have. It can still reintroduce yeast or bacteria if left dirty, so clean it after treating an infection to avoid re-infecting yourself.
Risks for Men and the Urethra
Vigorous masturbation can damage the urethra, the tube urine leaves through, causing inflammation.17sexualhealthsheffield.nhs.uk. Non-Specific Urethritis in men Repeatedly squeezing or inspecting the tip can cause swelling or pain.18sexualhealthsheffield.nhs.uk. Non-Specific Urethritis in men This kind of inflamed urethra isn’t an STI, though an STI test can rule that out.
It often shows up as stinging or burning when you pee, or a sore feeling at the tip of the penis. You may see mild redness at the opening or a small amount of clear discharge. Because those are also STI signs, a test is the way to tell the cause.
Checking the tip backfires. Squeezing or pulling at the opening to look for discharge irritates it, and that irritation can produce more discharge. Leaving it alone for a few days usually shows whether the symptom settles, and if it persists, a clinician can examine it properly.
To adjust your technique, use a lubricant to reduce friction, especially if you tend to get sore after dry or fast sessions. Ease off the grip and the speed if the tip feels raw rather than pushing through, and give the area a few days to settle, since continued friction slows healing.
Some people insert objects into the urethra for self-stimulation.19PubMed. Urethral Foreign Bodies: Clinical Presentation and Management Symptoms include painful peeing, blood in the urine, discharge and being unable to pee.20PubMed. Urethral Foreign Bodies: Clinical Presentation and Management Even after removal, UTIs, sepsis and urethral tearing have occurred.21PubMed. Urethral Foreign Bodies: Clinical Presentation and Management Left in, objects can cause stones, pus-filled pockets and abnormal openings between organs.22PubMed Central. Conservative Management for Urethral Foreign Body: A Case Report of an Adolescent Boy With Repeated Events See a doctor promptly, and don’t try to pull the object out yourself.
Household items and vegetables are not substitutes for toys. They can break or get lost inside, and they carry dirt and chemicals onto the genitals. Use items made for the body, with a flared base.
Who Is More Prone to Genital Infections
Obesity, diabetes and a weakened immune system raise the risk of vulvar infection many times over.23Atlas of Vulvovaginal Disease in Darker Skin Types. Vulvar Infections In one reported case, a woman with poorly controlled diabetes developed a life-threatening genital infection after a routine wax.24PubMed. Severe complications of a “Brazilian” bikini wax If you have these conditions, treat small cuts and irritation seriously.
With diabetes, high blood sugar means more sugar in body fluids and on the skin, which feeds yeast. The immune response can be weaker, so germs are cleared more slowly. Nerve damage can dull sensation, so small cuts or sores may go unnoticed for longer. Keeping blood sugar controlled helps, and so does avoiding rough play when skin is broken.
With obesity, skin folds around the genitals trap warmth and moisture, which yeast and bacteria like. Friction between skin surfaces can cause small breaks that become entry points. Keeping those areas clean and dry, and wearing breathable clothing, lowers the chance of trouble.
Symptoms That Need a Doctor
- Burning or frequent peeing: suggests a UTI.
- Unusual discharge, smell or itching: suggests yeast or BV, though STIs such as trichomoniasis can cause it too.
- Sores, blisters or warts: warrant STI testing.
- Fever, spreading redness or severe pain: needs urgent care.25American Journal of Case Reports. Fournier Gangrene in an Immunocompetent Woman Following Minor Perineal Manipulation: A Case Report
- An object stuck in the urethra, vagina or rectum: needs prompt medical removal.26PubMed Central. Electric wire as a urethral foreign body
Mild itching or a slight change in discharge can reasonably be watched briefly, particularly after a known trigger such as a new lube. Fever, severe pain, spreading redness, blood in the urine or being unable to pee call for same-day care. Pain in the lower back or side along with urinary symptoms can mean infection has reached the kidneys and needs prompt attention.
Avoid treating yourself again and again without a diagnosis. Yeast, BV and a UTI can feel alike, and treating the wrong one delays proper care. An antifungal product does nothing for BV while the real problem continues. Symptoms that keep coming back are a good reason to be tested rather than guess. When you see a clinician, mention saliva, lube type and toy use plainly, and say whether toys were shared.