What Actually Happens in Your Joints When The Local Weather Changes?
When patients visit our peaceful treatment rooms at Frogpool Manor Farm in Chislehurst complaining of increased stiffness before a storm or during a cold spell, we look at three main environmental triggers: barometric pressure, temperature, and humidity.
- The Barometric Pressure Effect
Barometric pressure is simply the weight of the atmosphere pressing against the Earth—and against our bodies.
Often as a change in weather occurs such, atmospheric pressure drops rapidly. This impacts the tissues surrounding your joints which act like a small balloon:
- When external pressure is high, it holds everything tight and compact, and everything inside exerts less force on the outside.
- When barometric pressure drops, there is less force pushing inward from the outside and so the inside can exert more force on the outside.
This drop allows joint capsule tissues, fascia, and ligaments to expand slightly, putting more pressure on tissues that are already irritated and inflamed. In a healthy joint with full mobility, you might never notice this micro-expansion. But in a joint already suffering from osteoarthritis, wear-and-tear, or chronic back and neck strain, that subtle expansion puts extra pressure on sensitive nerve endings.
- Temperature Drops and Synovial Viscosity
All joints contain synovial fluid, which lubricates cartilage, thickens under pressure and thins during rapid movement. It cushions joints under impact and from sudden forces, allowing smooth movement.
Synovial fluid also thickens on a cold day, making it less fluid and more like chilled honey. This is why knees, hips, and hands feel noticeably stiffer first thing on a cold morning. In addition survival instinct in cold temperatures triggers blood vessels in our limbs to constrict to ensure heat is saved for the vital organs, reducing circulation in our arms, hands, legs and feet. and leaving the soft tissues feeling tight and achy.
- Humidity and Soft Tissue Tension
When humidity levels rise, it can cause slight swelling in joint tissues, raising pressure inside the joint capsule. This pressure change can irritate nerves and pain receptors, leading to increased pain and stiffness. particularly for those managing joint conditions or systemic stiffness.