Winter is coming again, and many friends who come to ** feel more all of a sudden. Some friends who have been injured have also felt the changes in pain recently, and even some chronic pains that are not easy to occur are also frequent. Today we are going to talk about the relationship between temperature and pain, why it is so cold that the pain becomes more painful.
The effects of a decrease in ambient temperature on the body.
1. Muscle and fascia tension and even contracture, the decrease in ambient temperature will make a series of changes in the body, when the cold hits, the human body will contract the peripheral capillaries on the surface of the ** to produce heat and fight low temperature. Muscles throughout the body also contract and straighten and shiver to generate heat, which increases muscle viscosity, decreases joint mobility, and even impairs cellular microcirculation and releases inflammatory mediators. At the same time, after cold, the internal tension of the fascia increases, which further increases the pressure on the joint. If there is some hidden soft tissue damage in the joint at this time, or there is already inflammation of the joint and soft tissue pain, the pressure on the affected area will increase under the cold, which will also aggravate the pain feeling.
2.The pain threshold may change, due to the low temperature capillaries constriction, cell microcirculation disorders, metabolism decreases, and then the accuracy of nerve conduction is reduced, which will reduce the pain threshold of some people, so when the cold appears, the pain that is not felt is painful, and the pain feeling is aggravated.
3. Pressure change, air pressure change. This is a major contributor to knee pain in winter. Just before the cold weather arrives, the air pressure, the weight of the air around us, suddenly drops, causing the fluids and gases in the joints to begin to expand. That's why your nerves will have an unpleasant feeling of pressure, and that's why your knees will hurt. The combination of cold and humidity creates stress. When lower temperatures and higher humidity are combined, these two factors affect the cellular structure of bones and cartilage. As a result, it causes a sensation of expansion and contraction, which creates a feeling of joint pain.
4. Injuries can cause nerve sensitivity, and if you've ever had a knee injury, you may experience particularly sensitive symptoms such as inflammation, adhesions, or scarring. When it's cold outside, the nerves in the knee joint become more and more sensitive, and lower temperatures stimulate this sensitivity.
5. The temperature is low, and low temperature will thicken the joint fluid. The fluid inside the knee mainly absorbs shocks and shocks. But when the temperature drops, the fluid begins to thicken, inhibiting the free flow of fluid and stiffening the joints.
When the cold comes, the muscles and fascia are tense, the intra-articular pressure increases, and the warm and tight pants are clamped to further compress the knee joint, and the pain that is not triggered itself has been triggered.