Chills are a sensation of coldness that occurs due to a spasm of blood vessels. Accompanied by muscle tremors, "goose bumps". It can occur with hypothermia, fever, injury or infection.
People can notice the feeling of chills with a cold during a rise in temperature, but it also happens that the cause of its occurrence is difficult to explain. In case of illness, such a feeling means that the body has reacted to the incipient rise in temperature. Chills can also occur with hypothermia. Small tremors may appear due to hypertension - in the chest area, in the limbs. And even with strong emotional arousal, a person can alternately be swept by heat and cold.
Chills in humans are manifested due to the fact that there is a spasm of blood vessels penetrating the skin. This process can be triggered by various factors and is accompanied by a feeling of coldness, muscle tremors, spasm of the skin muscles, which leads to the formation of "goose bumps". With the further development of chills, the body gives off less heat to the external environment. Muscle contractions increase heat production, which leads to an increase in body temperature.
If there is a chill with a cold, when the temperature is about 37 degrees, it is better not to take antipyretic drugs. Fever is a sign that the immune system is trying to fight off an illness. Due to the increase in body temperature, microbes and viruses in the body begin to die. It is necessary to start the fight when the thermometer shows 38 degrees, regardless of whether chills appear or not. Temperatures that rise to this value can be dangerous for healthy cells. When it stabilizes, the chills come to an end, but with the slightest fluctuations, it can arise again.
The reasons for the appearance of chills are not always associated with an increase in temperature. Some people are distinguished by increased excitability, with strong excitement or fright, they feel shivering, chills. The nature of such a phenomenon is neurotic, it lies in the plane of subjective sensations, and once a person relax and calm down, they pass. Chills can occur due to stress, fatigue, mild ailments, or a decrease in pressure. This condition is familiar primarily to women who often experience it during menstruation, as well as in the first weeks of pregnancy.
The chills feel much stronger if there is little fluid in the body. With a cold, dehydration is not uncommon. The sick person should try to drink as much warm liquid as possible. It can be herbal infusions or fruit drinks, warm milk.
Chills by themselves are not a disease, but can be a symptom of a disease. For example, an unmotivated sensation of cold when it is concentrated in the fingers may be a signal for the development of Raynaud's disease, which manifests itself in periodic vasospasm in the extremities. Chills can also occur with vegetative vascular dystonia, hormone deficiency, decreased thyroid function and other health problems.