Psychology uncovers why aches and pains feel more intense at night - and why your mind may be making it worse

Aches and pains often seem to become more noticeable once the day comes to an end. Many people with arthritis, migraines, back pain, or muscle soreness report that discomfort feels stronger when they are trying to relax or fall asleep. While it may seem like the pain itself is suddenly getting worse, psychologists and medical researchers say that is not always the case. The brain, emotions, sleep patterns, and the body's natural clock all influence how pain is experienced. At night, fewer distractions, rising stress, fatigue, and changes in hormones can make the brain pay closer attention to pain signals. Research over the past several decades has shown that pain is not only a physical sensation but also a psychological experience. Understanding why nighttime pain feels more intense may help people find better ways to manage it and improve their sleep.

YOUR BRAIN NOTICES PAIN MORE WHEN THE WORLD BECOMES QUIET

Psychologists have long explained that attention plays a major role in pain perception. During the day, work, conversations, errands, and entertainment keep the brain occupied. At night, those distractions disappear, making the mind more aware of physical sensations. One of the leading experts in pain psychology, Professor Ronald Melzack of McGill University, introduced the famous 'Gate Control Theory of Pain' with British neuroscientist Patrick Wall in 1965. Their theory proposed that pain is not simply a direct response to injury. Instead, the brain and spinal cord can increase or reduce pain signals depending on emotions, attention, and previous experiences. This helps explain why discomfort may seem stronger when the mind has little else to focus on.


POOR SLEEP CREATES A CYCLE THAT MAKES PAIN FEEL WORSE

Sleep and pain have a two-way relationship. Pain makes it harder to sleep, and poor sleep makes pain feel more intense the next day. A major review published in 'Nature Reviews Rheumatology' by sleep researcher Dr. Nicole Tang and colleagues found strong evidence that sleep problems increase pain sensitivity in people with both chronic and short-term pain conditions. Research by Monika Haack, Janet M. Mullington, and colleagues at Harvard Medical School showed that even partial sleep loss can heighten pain sensitivity and reduce pain tolerance, highlighting the close relationship between sleep and pain perception. Psychologists believe this happens because sleep deprivation affects areas of the brain responsible for emotional regulation and pain processing. As a result, the brain reacts more strongly to the same pain signals.

STRESS, ANXIETY, AND NEGATIVE THINKING CAN AMPLIFY PAIN

Pain is closely linked with mental health. Anxiety, stress, and excessive worrying can make the nervous system more alert, increasing the body's sensitivity to pain. Research by psychologist Professor Michael E. Geisser has shown that pain catastrophizing - constantly expecting the worst or focusing on pain - can significantly increase how severe pain feels. Likewise, psychologist Professor Steven J. Linton of Örebro University has found that fear, anxiety, and emotional distress contribute to both the intensity and persistence of chronic pain. At night, when people replay the day's worries or become anxious about not sleeping, these thoughts may amplify the brain's interpretation of pain. This does not mean the pain is imaginary. Instead, psychological factors can make genuine pain feel stronger.

YOUR BODY'S INTERNAL CLOCK ALSO CHANGES PAIN SENSITIVITY

The body's circadian rhythm influences hormones, inflammation, and the nervous system throughout the day. Scientists now believe that pain sensitivity naturally rises during the evening and nighttime. A 2023 study published in 'Brain' by researchers led by Dr. Damián D. de la Iglesia and colleagues found that the human pain system follows a circadian rhythm, with pain sensitivity reaching its highest levels during the night and lowest levels during the afternoon. The findings suggest that the body's internal biological clock, rather than activity alone, plays an important role in how pain is experienced.

Experts say managing nighttime pain often requires addressing both body and mind. Good sleep habits, relaxation techniques, regular exercise, stress management, and psychological therapies such as cognitive behavioral therapy (CBT) have all been shown to reduce pain intensity in many people. As research continues, psychologists are gaining a deeper understanding of how thoughts, emotions, sleep, and biology work together to shape the experience of pain, especially after dark.