Liking pain is more common than most people assume, and it has a straightforward biological explanation: your brain processes pain and pleasure through overlapping circuits. The same region that responds to a reward like food or sex also lights up during a painful stimulus, releasing a cocktail of chemicals that can make pain feel satisfying, exciting, or even euphoric. This isn’t a sign that something is wrong with you. It’s a feature of how human brains are wired.
Pain and Pleasure Share the Same Brain Wiring
The key player is a small, deep brain structure called the nucleus accumbens, best known as the brain’s reward center. This region is densely packed with opioid receptors and receives signals from nearly every major pain-processing area in the brain, including the prefrontal cortex, the anterior cingulate cortex, and the thalamus. When something hurts, the nucleus accumbens doesn’t just register “bad.” It evaluates the experience, weighing competing motivations so you can decide whether the pain is worth enduring.
Two separate pathways feed into this system. One is linked to positive feelings and reward. The other is linked to aversion and discomfort. Both run through the same structure, which means pain and pleasure aren’t opposite ends of a single dial. They’re two signals that can fire simultaneously. Research in animals has confirmed that painful stimuli like a sharp pinch or a burn trigger dopamine release in the nucleus accumbens, the same chemical surge you’d get from something enjoyable. Your brain is literally generating a reward signal in response to pain.
The Endorphin Rush Is Real
When your body detects pain, it launches a chemical defense. Cells in the pituitary gland break down a large precursor molecule into several active peptides, including endorphins. These natural opioids bind to the same receptors that morphine targets, and in some cases their painkilling effects are even stronger. That’s why a hard workout, a tattoo session, or eating an intensely spicy meal can produce a wave of calm or even giddiness once the initial sting fades.
Endorphins don’t just dull pain. They actively produce pleasure. This is why the experience of pain can feel rewarding rather than purely negative: the chemical response your body mounts to protect you also happens to feel good. Immune cells throughout your body also produce endorphins, which means the response isn’t limited to your brain. It’s a whole-body event.
The Relief Effect: Why Pain Ending Feels So Good
Part of what makes pain enjoyable is what happens the moment it stops. Research shows that when a painful stimulus ends, the brain simultaneously boosts positive feelings and reduces negative ones, a phenomenon called pain-offset relief. This isn’t just the absence of pain. It’s an active burst of good feeling that lasts for at least several seconds. The more intense the pain was, the more pronounced the positive surge when it stops.
This is the same mechanism behind the post-workout high, the satisfaction after surviving a cold plunge, or the warm glow after a deep-tissue massage that bordered on painful. Your brain rewards you for getting through it. Some researchers believe this relief response originally evolved to motivate injured animals to keep moving and survive despite their wounds, essentially turning pain tolerance into a survival advantage.
Benign Masochism: Enjoying Pain on Purpose
Psychologist Paul Rozin coined the term “benign masochism” to describe the widespread human habit of deliberately seeking out mildly painful or unpleasant experiences for fun. Spicy food, horror movies, scorching saunas, emotional music that makes you cry: these all qualify. The concept is simple. Your body interprets the stimulus as threatening, but your conscious mind knows you’re safe. That gap between the body’s alarm and the mind’s reassurance creates a unique form of pleasure, a feeling Rozin describes as “mind over body.”
One of the most consistent findings in this research is that people who enjoy these experiences tend to prefer an intensity just below what they can’t tolerate. They’re not seeking maximum pain. They’re seeking the edge, the point where the body is fooled into reacting but the mind stays in control. That sense of mastery is itself rewarding. It reframes the discomfort as a kind of accomplishment.
Exercise Soreness as a Reward
Gym culture offers one of the clearest examples of learned pain enjoyment. Qualitative research on gym-goers and delayed onset muscle soreness (the deep ache you feel a day or two after a hard workout) has mapped out how people come to love the burn. Beginners typically find soreness unpleasant and discouraging. Over time, through a process of reframing and socialization, they learn to associate the sensation with progress. Eventually, soreness becomes something they actively seek out and feel unsatisfied without.
This process unfolds in three stages: first, learning workout techniques that produce the right kind of effort; second, recognizing that soreness is connected to effective training rather than injury; and third, redefining the sensation as genuinely enjoyable. For experienced gym-goers, soreness often becomes a social signal too, something they display or discuss as proof of dedication. The pain stops being an obstacle and becomes part of their identity.
The Biology of Consensual Pain in Intimacy
For people who enjoy pain in a sexual or intimate context, biology offers a concrete explanation. A study of 35 couples who practiced BDSM measured hormone levels before and after a session and compared them to a control group having a regular social interaction. Submissive partners, the ones receiving painful stimuli, showed significant increases in both cortisol (a stress hormone) and endocannabinoids (the body’s own cannabis-like molecules, associated with pleasure and relaxation). Dominant partners showed increased endocannabinoids only when the interaction involved power exchange.
The finding is notable because it shows the pleasure wasn’t just psychological. The submissive participants’ bodies were measurably stressed and measurably rewarded at the same time. The increase in endocannabinoids, which promote calm and well-being, was directly tied to the increase in stress. In other words, the pleasure didn’t happen despite the pain. It happened because of it.
Why Some People Like Pain More Than Others
Not everyone responds to pain the same way, and genetics play a role. Variations in genes that control how your brain breaks down dopamine and other signaling chemicals influence both how sensitive you are to pain and how your mood responds to it. One well-studied gene, COMT, affects concentrations of dopamine and norepinephrine in the brain. Different versions of this gene are linked to differences in pain sensitivity and in how much someone dwells on or catastrophizes painful experiences. Genes involved in opioid receptor function also likely shape how much natural painkilling and reward your brain generates in response to a painful stimulus.
That said, genetics alone don’t determine whether you’ll enjoy pain. A large study that tested multiple gene variants found no statistically significant link between those variants and overall pain tolerance after accounting for gender, race, and psychological factors. Your mindset, your past experiences, and the context of the pain all matter enormously. Pain during a tattoo you chose feels completely different from pain during an injury, even if the physical sensation is identical. Context is what separates pain you like from pain you don’t.
When Pain-Seeking Becomes a Concern
Benign masochism and self-harm can look similar on the surface since both involve deliberately experiencing pain. But they’re driven by different things. Benign masochism is about enjoying the interplay between discomfort and safety. It’s voluntary, controlled, and tied to pleasure or accomplishment. Self-harm typically serves a different function: managing overwhelming emotions, punishing oneself, or trying to feel something when emotionally numb.
Research has found that benign masochism is positively correlated with mild self-injurious behaviors, meaning people who score higher on one tend to score higher on the other. But benign masochism and antisocial personality traits each contribute independently to self-harm risk, suggesting they’re separate pathways to similar behavior. The practical distinction usually comes down to motivation and control. If you enjoy the soreness after a workout or the heat of a chili pepper, that’s your reward system working as designed. If you’re seeking pain to cope with distress you can’t manage any other way, the underlying need is different, and it’s worth exploring with a professional.