Masturbation triggers a cascade of hormone and neurotransmitter activity that affects your body for up to an hour afterward, and the short answer is that it’s safe. It doesn’t cause hair loss, blindness, infertility, or genital damage. What it does cause is a temporary shift in your body chemistry that can influence your mood, sleep, immune function, and pain levels.
What Happens in Your Body
During arousal and orgasm, your brain releases a mix of chemicals that produce the sensations of pleasure and relaxation. Dopamine drives the feeling of reward. Oxytocin, sometimes called the bonding hormone, creates a sense of warmth and calm. Endorphins act as natural painkillers. Together, these chemicals are responsible for the mood lift many people notice afterward.
After orgasm, your body releases a significant surge of prolactin, a hormone produced by the pituitary gland. Plasma prolactin levels rise substantially and stay elevated for over an hour. This prolactin spike is what creates the feeling of satisfaction and reduced arousal that follows orgasm. It essentially acts as a biological “off switch” for sexual drive, signaling your brain that the cycle is complete. Chronically elevated prolactin (a medical condition, not something caused by normal masturbation) can reduce libido, but the temporary post-orgasm rise is routine and harmless.
Effects on Sleep
Many people masturbate before bed specifically because it helps them fall asleep, and there’s a biological basis for that. The combined release of oxytocin and prolactin, paired with a drop in cortisol (your primary stress hormone), creates a relaxing effect. Prolactin in particular has sedative properties. The strongest relaxation window is within about 60 minutes of orgasm, which is why timing it close to bedtime tends to work best.
Effects on Mood and Stress
Orgasm from masturbation also stimulates the release of endocannabinoids, which are your body’s own version of the compounds found in cannabis. A study published in the Journal of Sexual Medicine found that masturbation to orgasm significantly increased plasma levels of one key endocannabinoid called 2-AG. These molecules contribute to feelings of relaxation and well-being. Interestingly, the same study found that cortisol levels were not significantly altered by masturbation, which suggests the stress relief people feel is driven more by the pleasure and relaxation chemicals than by a direct reduction in stress hormones.
Temporary Immune System Boost
A small study published in the journal Neuroimmunomodulation measured immune markers in men before, during, and after masturbation. Researchers found that orgasm temporarily increased the activity of certain white blood cells, particularly natural killer cells, which target virus-infected cells and cancer tumor cells. This boost can last up to 24 hours, with the strongest effects occurring within the first hour. That said, this is a transient spike in immune activity, not a lasting enhancement. It wouldn’t protect you from illness in any meaningful, long-term way.
Possible Link to Prostate Health
For men, frequent ejaculation may offer one notable long-term benefit. A large study tracked by Harvard Health Publishing found that men who ejaculated 21 or more times per month had a 31% lower risk of prostate cancer compared to men who ejaculated 4 to 7 times per month. A separate analysis within the same research found that men averaging roughly 5 to 7 ejaculations per week were 36% less likely to be diagnosed with prostate cancer before age 70. The exact mechanism isn’t fully understood, but the association has held up across multiple rounds of follow-up data.
Pain Relief for Menstrual Cramps
Orgasm can provide temporary relief from menstrual cramps. The endorphins released during climax act as natural pain blockers, and the increased blood flow to the pelvic region combined with the rhythmic muscle contractions of orgasm may further ease cramping. The relief is temporary, but for some people it’s enough to take the edge off without reaching for medication.
Physical Side Effects
The most common physical issue is simple friction. Masturbating without enough lubrication can cause chafing, skin irritation, or tenderness. This is temporary and resolves on its own. Using lubricant prevents most of these issues. There is no evidence that masturbation causes genital damage, desensitization, or any lasting physical harm when done with reasonable care.
Common Myths That Aren’t True
- Hair loss: Premature hair loss is driven by genetics, not masturbation. The average person sheds 50 to 100 hairs daily as part of the normal growth cycle, regardless of sexual activity.
- Blindness: There is no scientific connection between masturbation and vision problems. This myth has been debunked repeatedly.
- Infertility: Sperm quality remains consistent even with daily ejaculation. Masturbation does not reduce fertility.
- Weakness or fatigue: The temporary tiredness after orgasm is caused by prolactin and oxytocin, not by any loss of energy or nutrients. It passes within an hour or so.
Many of these myths trace back to cultural and religious anxieties rather than science. The cereal brand Kellogg’s, for example, was originally marketed in the 1890s as a way to suppress sexual desire. Its inventor, Dr. John Harvey Kellogg, believed bland food could curb masturbation. There was never any evidence for this.
How Often Is Typical
There’s no “normal” frequency. Data from the National Survey of Sexual Health and Behavior found that about a quarter of men aged 18 to 59 masturbated a few times per month to once a week, while roughly 20% did so 2 to 3 times per week. Fewer than 20% masturbated more than 4 times a week. Most women in the survey masturbated once a week or less. For teenagers and adults over 70, masturbation was more common than partnered sex.
A 2017 study of over 15,000 adults found an interesting gender split in patterns. Women tended to masturbate more when they were already having frequent, satisfying sex, treating it as a complement. Men tended to masturbate more when they were having less sex or were less satisfied, using it as a substitute. Neither pattern is unhealthy.
When It Becomes a Problem
Masturbation itself isn’t harmful, but it can become problematic if it starts interfering with your daily life, relationships, work, or responsibilities. The World Health Organization recognizes compulsive sexual behavior disorder as an impulse control disorder in its diagnostic system (ICD-11), though there’s ongoing debate among mental health professionals about exactly how to define it. The key distinction isn’t about frequency. It’s about whether the behavior feels out of control and is causing real consequences in your life, like missing obligations, damaging relationships, or creating significant distress. If that describes your experience, it’s worth talking to a therapist who specializes in sexual health.