A sudden or persistent spike in sex drive is almost always driven by something identifiable: a hormonal shift, a change in your stress levels, a new relationship, or even a change in how much you’ve been exercising. It’s rarely random, and it’s not something wrong with you. Understanding the most common triggers can help you figure out which one applies to your situation.
Hormonal Shifts Are the Most Common Cause
If you have a menstrual cycle, your libido naturally rises and falls throughout the month. Many people experience their highest sex drive during ovulation, roughly midway through the cycle, when estrogen peaks. Oxytocin also climbs during this window, and your body releases a surge of luteinizing hormone to trigger the release of an egg. Some combination of these three hormones is likely responsible for that “can’t stop thinking about it” feeling that hits for a few days each month.
After ovulation, progesterone takes over, and many people notice a sharp drop in desire. So if your increased drive lines up with the middle of your cycle, that’s the most straightforward explanation. Tracking your cycle for a month or two can confirm whether the pattern matches.
Outside of the monthly cycle, other hormonal events cause the same effect. Puberty, pregnancy (especially the second trimester), and even perimenopause can all increase libido. Some women feel more sexually liberated after menopause, no longer worrying about pregnancy, periods, or people-pleasing, and find that desire returns or even improves when other factors are in place.
Stress Can Increase Desire, Not Just Kill It
Most people assume stress lowers libido, and it often does. But the opposite reaction is just as real. When you’re stressed or anxious, you may crave the feelings of care and safety that come with physical intimacy. Sex becomes a way to self-soothe, to feel connected, or simply to escape whatever is weighing on you. If you’ve been going through a difficult period at work, in your finances, or in your personal life, a libido spike can be your body’s way of seeking comfort and distraction.
There’s also a “wanting what you can’t have” dynamic. When circumstances make sex feel less available or appropriate, some people find their desire increases in response. And when fears about the future or big life changes surface, many people instinctively seek deeper intimacy with a partner, which registers as a higher sex drive.
New Relationships and Novelty
If you’ve recently started seeing someone new or even developed a crush, that alone can explain everything. The brain responds powerfully to sexual novelty. Researchers describe this as the renewal of sexual motivation after exposure to a new partner, sometimes called the Coolidge effect. It’s a well-documented pattern across species: repeated encounters with the same partner gradually reduce arousal over time, while a new partner resets it.
In practical terms, this means the early months of a relationship (or even a new flirtation) naturally come with elevated desire. Your body produces more oxytocin when you’re excited by a sexual partner or falling in love, reinforcing the cycle. This eventually levels off, which is normal, but while it lasts, your sex drive can feel dramatically higher than your baseline.
Exercise Changes Your Baseline
If you’ve recently started working out more, or changed the type of exercise you do, that can directly raise your libido. Research shows that exercise improves both sexual function and sexual desire, particularly in people who were previously sedentary. People in moderate-to-high exercise groups report significantly higher sex drive compared to those who barely exercise.
There’s a nuance here, though. Very high volumes of intense endurance exercise, like heavy marathon training, can actually suppress testosterone and lower desire. The sweet spot for libido appears to be regular, moderate activity rather than extreme training loads. If you recently went from a sedentary routine to hitting the gym several times a week, the boost in circulation, energy, and hormone production could easily explain the change.
Medications and Supplements
Certain medications raise libido as a side effect. One well-known example is bupropion, a medication prescribed for depression and smoking cessation that affects dopamine and norepinephrine. Unlike most antidepressants, which tend to dampen sexual desire, bupropion can boost sex drive, increase arousal, and even intensify orgasms. If you recently started or switched a medication, check whether increased libido is a known side effect.
On the nutritional side, correcting a deficiency can sometimes restore or increase sex drive. Studies have found that people deficient in vitamins E and C who begin supplementing experience increases in libido and sexual satisfaction. If your diet has recently improved, or you’ve started taking a multivitamin after a period of poor nutrition, the change could contribute.
Sleep, Seasons, and Other Subtle Triggers
Better sleep raises testosterone in both men and women. If you’ve recently started sleeping more consistently, even an extra hour per night, your body has more resources to devote to producing sex hormones. The effect is surprisingly fast: even a few nights of improved sleep can shift your hormonal balance enough to notice a difference in desire.
Seasonal changes play a role too. Many people notice higher libido in spring and summer, likely related to increased sunlight exposure and its effects on mood and hormone regulation. Alcohol and certain recreational substances can also temporarily lower inhibitions and increase perceived arousal, so changes in your social habits could be a factor.
When a High Sex Drive Becomes a Problem
For most people, a period of increased desire is completely normal and temporary. It becomes worth paying attention to if it feels compulsive, if it interferes with your daily responsibilities, or if you find yourself engaging in sexual behavior that conflicts with your values or puts you at risk. A persistent, overwhelming drive that feels out of your control, particularly if it’s accompanied by impulsivity in other areas of your life, can sometimes signal a hormonal imbalance, a medication side effect, or a mental health condition worth exploring with a professional.
But if your sex drive is simply higher than usual and you’re otherwise functioning well, it’s almost certainly one of the factors above. The most useful thing you can do is look at what else has changed recently: your cycle timing, your stress levels, your relationship status, your exercise habits, your sleep, or your medications. The answer is usually sitting in one of those categories.