Surgical pain often feels more intense at night primarily due to the body's natural hormonal fluctuations and circadian rhythms.
The Role of Cortisol
- Reduced Cortisol Levels: One significant factor is the body's production of cortisol, an anti-inflammatory hormone. According to research, "Nighttime is when the production of the anti-inflammatory hormone cortisol is at its lowest." This means that the body's natural ability to reduce inflammation and pain is diminished during the night, making surgical pain feel more pronounced.
Circadian Rhythms and Pain
- Internal Clock: The body's internal 24-hour clock, known as the circadian rhythm, also plays a role. New research suggests that pain itself may follow this rhythm, meaning pain sensitivity may be naturally higher at certain times of the day, often at night, exacerbating the feeling of surgical pain.
Summary of Why Surgical Pain Feels Worse at Night
| Factor | Description | Impact on Pain |
|---|---|---|
| Cortisol Production | Lowest at night | Reduced anti-inflammatory effect, increased perceived pain |
| Circadian Rhythms | Possible natural cycle of increased pain sensitivity at night | Exacerbated pain experience during nighttime |
In short, the combination of lower anti-inflammatory hormone production and a potential circadian pattern that increases pain sensitivity contribute to why surgical pain often feels worse at night.
