Not enjoying sex is far more common than most people realize, and there’s almost always a reason behind it. An Australian study of over 10,500 women found that low sexual desire affected anywhere from 27% of young adults to over 90% of older adults, and roughly one in three women between ages 40 and 64 experienced low desire that caused them personal distress. While that study focused on women, low desire affects all genders. The causes range from hormones and medications to stress, pain, past experiences, and sometimes simply your orientation. Understanding what’s driving your experience is the first step toward figuring out whether anything needs to change.
Your Hormones May Be Working Against You
Sex drive is heavily influenced by hormone levels, and several common shifts can quietly lower desire. Testosterone, often thought of as a male hormone, plays a central role in libido for everyone. Levels naturally decline with age, but they can also drop from medical conditions, certain medications, and lifestyle factors like smoking. When testosterone drops, sexual interest often drops with it.
Estrogen matters too, especially during perimenopause, menopause, and the postpartum period. Falling estrogen levels reduce desire directly and can also cause vaginal dryness and discomfort that make sex feel unpleasant. For people who are breastfeeding, estrogen stays low for at least six months, and sometimes for as long as nursing continues. Prolactin, the hormone that supports milk production, rises during breastfeeding and actively suppresses both estrogen and testosterone. This is why so many new parents feel like their sex drive has vanished entirely. It’s a normal hormonal response, not a personal failing.
High prolactin levels outside of breastfeeding can also suppress desire. Certain medications and pituitary conditions raise prolactin, and if your low interest in sex came on alongside other symptoms like irregular periods or unexpected breast discharge, prolactin could be a factor worth investigating.
Stress Directly Suppresses Desire
Chronic stress does something very specific to your sex drive: it floods your body with cortisol, the primary stress hormone, which interferes with the production of testosterone, estrogen, and progesterone. For people with testes, cortisol competes directly with testosterone, lowering libido and making arousal harder to achieve. For people with ovaries, elevated cortisol can disrupt the menstrual cycle, dampen arousal, decrease desire, and even contribute to vaginal dryness or painful intercourse.
This isn’t just about feeling too tired or distracted for sex, though that’s part of it. Stress physically changes your hormonal landscape in ways that make sex less appealing on a biological level. If your disinterest in sex coincides with a demanding job, financial pressure, caregiving responsibilities, or any sustained source of anxiety, your body may literally be redirecting its resources away from reproduction and toward survival.
Medications Can Quietly Kill Desire
If you started losing interest in sex around the same time you began a new medication, the connection may not be coincidental. Antidepressants in the SSRI class are among the most well-known libido suppressors. These include commonly prescribed medications like Prozac, Zoloft, Lexapro, and Paxil. Between 35% and 50% of people with untreated major depression already experience some form of sexual dysfunction before starting medication, so it can be hard to tell whether the drug or the depression is responsible. But SSRIs are known to reduce desire, delay orgasm, and dull physical sensation in a significant number of people who take them.
Blood pressure medications, hormonal birth control, anti-seizure drugs, and certain antihistamines can also lower libido. If you suspect a medication is the cause, it’s worth exploring alternatives with your prescriber. Switching to a different drug in the same class, adjusting the dose, or adding a second medication to counteract the sexual side effects are all options that work for many people.
Sleep Loss Has a Measurable Effect
Sleep deprivation does more than make you tired. A study from the University of Chicago found that healthy young men who slept fewer than five hours per night for just one week saw their testosterone levels drop by 10% to 15%. That’s a significant decline from only seven days of poor sleep. For people already on the lower end of normal testosterone, that reduction can be enough to noticeably reduce sexual interest. If you’re chronically under-sleeping, whether from insomnia, shift work, a new baby, or late-night scrolling, your low desire may partly be a sleep problem.
Pain Makes Sex Something to Avoid
If sex hurts, your brain will eventually stop wanting it. Pain during intercourse is surprisingly common and has many possible causes. Insufficient lubrication, often from not enough foreplay or from hormonal changes, is one of the simplest and most fixable. But pain can also come from infections, skin conditions in the genital area, scarring from surgery or childbirth, or a condition called vaginismus, where the vaginal muscles involuntarily tighten and make penetration painful or impossible.
Deeper pain during sex can point to conditions like endometriosis, pelvic inflammatory disease, ovarian cysts, fibroids, or pelvic floor dysfunction. Cancer treatments including radiation and chemotherapy can also cause lasting changes that make sex uncomfortable. When your body has learned to associate sex with pain, even if the original cause is resolved, it can take time and sometimes targeted therapy to rebuild a positive association. You’re not broken for wanting to avoid something that hurts.
Depression and Past Trauma
Depression doesn’t just lower your mood. It flattens your capacity for pleasure across the board, including sexual pleasure. Loss of interest in sex is one of the hallmark symptoms of depression, and it often persists even when other symptoms improve. The relationship between depression and low desire runs in both directions: depression reduces desire, and the distress of having no desire can deepen depression.
Past sexual trauma, even trauma that happened years or decades ago, can also make sex feel unsafe, uncomfortable, or simply unappealing. Trauma responses don’t always look dramatic. Sometimes they show up as a quiet sense of disconnection during sex, a tendency to go through the motions without feeling present, or a vague sense of dread when sex is expected. These responses are protective. They’re your nervous system doing exactly what it’s designed to do. Working with a therapist who specializes in sexual trauma can help, but recognizing the connection is an important first step on its own.
Relationship Factors
Sometimes the issue isn’t your body or your brain. It’s the dynamic between you and your partner. Unresolved conflict, feeling emotionally distant, a lack of trust, feeling pressured or obligated, or simply being bored after years together can all reduce desire. For many people, emotional safety and connection are prerequisites for wanting sex, not extras. If you feel criticized, controlled, or taken for granted outside the bedroom, your body is unlikely to switch into a mode of vulnerability and openness inside it.
It’s also worth considering whether the sex you’re having is sex you actually enjoy. Many people go through years of sexual activity shaped by a partner’s preferences, cultural scripts, or assumptions about what sex is “supposed to” look like, without ever exploring what genuinely feels good to them. If sex has always felt like something you do for someone else, the problem may not be your desire. It may be that you haven’t yet had the kind of sex that speaks to your own experience of pleasure.
Asexuality Is Not a Problem to Solve
If you’ve never really been interested in sex, or if you’ve felt this way for as long as you can remember, it’s worth considering whether you might be asexual. Asexuality is a sexual orientation characterized by little or no sexual attraction to others. It’s stable, inherent, and not caused by hormones, trauma, or medication. Asexual people may still experience romantic attraction, emotional intimacy, and even physical arousal, but they don’t feel drawn to sexual activity in the way most people describe.
The key distinction between asexuality and low libido is where it comes from and how it feels. Low libido typically develops in response to something, like stress, a health change, or a relationship issue, and it often feels like a loss compared to a previous state. Asexuality is consistent over time, usually present from early in life, and doesn’t feel like something is missing. The distress asexual people experience, if any, usually comes from social pressure or partner expectations rather than from the orientation itself. Asexuality is not a condition that needs treatment. If this resonates with you, communities like AVEN (the Asexuality Visibility and Education Network) can offer connection and validation.
Figuring Out What Applies to You
The causes above aren’t mutually exclusive. Plenty of people are dealing with a combination: maybe you’re on an SSRI, sleeping poorly, and in a relationship that’s lost its spark. The most useful starting point is to ask yourself whether your disinterest in sex is new or lifelong, whether it’s specific to your current situation or applies across the board, and whether it bothers you personally or only feels like a problem because someone else thinks it should be.
If it’s new, consider what changed around the time it started. A medication, a baby, a stressful period, a health diagnosis, or a shift in your relationship can all be entry points for understanding what’s happening. If it’s lifelong and doesn’t cause you distress, you may simply be someone who doesn’t prioritize sex, and that’s a perfectly valid way to exist. If it does cause you distress, a healthcare provider can check hormone levels and review your medications, and a therapist who specializes in sexual health can help you sort through the psychological and relational layers.