Low Libido - What Does It Actually Mean?

Isla Oliver
Jul 16
5 min read

Isla Oliver, DNP, CNM, ARNP

"Low libido" is a phrase that gets used a lot — by doctors, on social media, and in late-night internet searches. But what does it actually mean? And when does a dip in sexual interest become something worth bringing up with a doctor?

Different People Want Different Amounts of Sex

There's no such thing as a "normal" level of sexual desire. It varies a lot from person to person, and it can change over time depending on stress, relationships, health, and plenty of other factors [1][2]. Some people want sex several times a week; others are perfectly happy with much less — and both are completely normal [2].

This variation also connects to identity. Some people identify as asexual, meaning they feel little or no sexual desire, without any distress about it [3]. That's very different from someone who used to feel desire, has noticed it fade — and is bothered by the change. Most experts agree on one key point: low libido is only a "problem" if it bothers the person experiencing it [1][2].

When Is It a Medical Concern?

Since sexual desire naturally shifts so much — both between people and within the same person over time — how do we decide when it's worth investigating? There's no specific number that counts as "enough" desire. What actually matters is whether the change has lasted a while and whether it's causing distress.

In women, this used to be called Hypoactive Sexual Desire Disorder (HSDD). It's now more often referred to as Female Sexual Interest/Arousal Disorder (FSIAD). To meet the criteria for these diagnoses, a person needs to have noticeably fewer sexual thoughts or less interest in starting sex, and this needs to be distressing, and last for at least six months [4]. In other words, low desire by itself isn't a disorder — it only becomes one when it's unwanted and causes real suffering [5].

The Biopsychosocial Model

Doctors used to look for a single cause of low libido, like "it's just your hormones" or "it's just stress." Today, most experts rely on something called the biopsychosocial model. It sounds complicated, but the idea is simple: sexual desire is shaped by a mix of your body (hormones, physical health), your mind (stress, anxiety, depression, body image), and your life (relationships, communication, and cultural attitudes toward sex) [7][8].

Why It Matters to Look at the Whole Picture

Because so many different things can affect desire, treating low libido means looking beyond just the physical side. Low libido can wear down someone's self-esteem, create tension in relationships, and be closely tied to depression and anxiety [13]. If it's ignored, it can also mask other issues worth treating — like a medical condition, a medication side effect, or unresolved conflict in a relationship — none of which a pill alone will fix [6][13].

That's why jumping straight to a prescription, without considering someone's emotional and social life, risks treating the symptom while missing the actual cause.

The Role of Hormones

Hormones are a real piece of the libido puzzle, but the relationship isn't as simple as "low hormones equal low desire."

Testosterone is present in both men and women and plays a role in sexual desire. In postmenopausal women, testosterone has shown benefits in several clinical trials, with women reporting more satisfying sexual experiences compared to a placebo [15][16]. However, there's no agreed-upon "low" testosterone level for women, so a blood test alone can't determine whether someone needs testosterone treatment.

Estrogen levels also play a role, but only directly relate to libido for males [17]. For people with ovaries, the drop in estrogen during menopause certainly causes symptoms like hot flashes, mood changes, and trouble sleeping — and these symptoms can lower desire indirectly. Treatment for this is usually guided by whether those symptoms improve, not by hitting a specific estrogen level.

The Limits of Hormones

Hormones are far from the whole story, and the sexual medicine community has grown more cautious about reducing low libido to a simple hormone problem.

For one thing, the connection between a woman's testosterone level and how much she desires sex is weak — there's no clear, consistent pattern, even though testosterone therapy has shown real benefits in studies [16]. Increasingly, research points to factors like stress, relationship satisfaction, and mental health as having a bigger impact [1].

Estrogen therapy reliably helps with physical symptoms like vaginal dryness, hot flashes, and other menopausal symptoms, but it hasn't been shown to directly boost sexual desire on its own [16][18]. And testosterone therapy for women remains something of a gray area: no testosterone product is FDA-approved specifically for women in the U.S. As a result, it's typically prescribed off-label, using products designed for men, and always has to be paid for out of pocket [18][19].

Medications on the Market

For people diagnosed with HSDD (or FSIAD) whose symptoms don't improve through addressing psychological or relationship factors, a few FDA-approved medications are available:

Flibanserin (Addyi) — a once-daily, non-hormonal pill that works on brain chemicals rather than hormones. It was originally approved in 2015 for premenopausal women with HSDD, and its approval was expanded in December 2025 to include postmenopausal women under 65 [20][21].
Bremelanotide (Vyleesi) — an as-needed injection, self-administered at least 45 minutes before anticipated sexual activity, approved for premenopausal women with HSDD. Like flibanserin, it works through the brain rather than hormones, though clinical trials showed only a modest benefit over placebo [22][23].
Testosterone therapy — while not officially FDA-approved for women, topical testosterone (daily gel) is sometimes prescribed off-label for postmenopausal women with low desire, based on trial evidence and under a specialist's guidance [15][19].

The Bottom Line

Low libido isn't a single condition with a single fix — it's one of the many parts of being human that becomes a medical concern when it's persistent and distressing. Good care means looking at the full picture — body, mind, and relationships — and treating hormones as just one piece of the puzzle rather than the whole explanation. That said, it is absolutely worth it to explore every aspect of low libido. Because everyone deserves to have a satisfying, healthy sex life, whatever that means for them as an individual.