Cold shivers are an automatic response of the body to regulate the internal temperature.

In practice, it is a muscle contraction that occurs with a feeling of cold and tremors.
Chills usually occur in the event of:

  • Fever ,
  • Exposure to cold.

Chills and fever can be caused by:

  • Relatively benign diseases, such as the  cold,
  • Serious illnesses such as malaria or meningitis .

Chills and fever are more common in children than in adults.

Exposure to cold temperatures and low body temperature (below 37 ° C) can cause chills.
In addition, autoimmune inflammatory diseases and some cancers can cause fever and chills.


What causes chills without a fever?

Chills without fever can be a reaction of the body to a cold environment.
It can be a symptom of some other diseases listed below.

Anemia. The anemia is a disease caused by reduction in the number of red blood cells; is one of the most frequent causes of chills.
Anemia is a disease that can cause greater sensitivity to cold.
Women may suffer from chills during the menstrual cycle , but they are not a symptom of ovulation .
This is due to:

  • Loss of blood ,
  • Reduction of red blood cells during menstruation.

Thyroid Disorders
The thyroid is an endocrine gland that has several important functions including regulation:

  • From body temperature,
  • Of metabolism.

If the thyroid is not working properly, the person may experience chills without fever and fatigue .

Nutritional deficiencies can affect the ability to tolerate cold.
For example, lack of B-complex vitamins may predispose to anemia; thus increasing sensitivity to cold.

The stress  has a negative effect on the immune system and can also cause a hormonal imbalance that affects the regulation of body temperature.

Hypoglycemia may be responsible for chills.
A person with low blood sugar may have:

  • Cold sweats,
  • Headache ,
  • Tremor,
  • Anxiety ,
  • Discomfort.

If blood sugar levels are too low, vertigo may also occur .

Administering certain medicines
Prolonged use of certain medicines can cause chills without fever. Narcotics for pain and interferon beta can cause a feeling of intense cold.

Weight Problems
There is a connection between fat and sensitivity to cold. People who are underweight have more frequent chills.
Fat helps to retain body heat.

Allergic reaction
Sometimes chills are caused by an allergic reaction .
Some people may have chills with or without fever:

  • If they come in contact with an allergen ,
  • After an insect bite .

Low blood pressure
low pressure can cause fatigue and chills, even if it is hot outside.

Menopause Chills
In menopause, hot flashes occur when hormone levels are changing because they affect the body’s temperature center in the brain (hypothalamus). Severe sweating
may occur to cool the body. When the heat passes, the skin is wet and can cause severe chills.


Causes of chills with fever

If a sudden feeling of intense cold and chills are accompanied by fever, it usually means that the body is fighting an infection .
Chills occur as a reaction of the body to maintain the temperature at the ideal level, even when the weather is hot.

Chills and fever can be caused by many diseases.
Below are some common causes.

Seasonal flu.  Among the main symptoms of influenza are:

  • Chills,
  • Fever.

Other symptoms of this infection are generalized pain and lack of energy.

Malaria . A high fever with chills in cycles of 48-72 hours is one of the main symptoms of malaria.

Pneumonia. Chills and fever are common symptoms of pneumonia .
Other possible symptoms are

Sore throat. This infection can cause chills and sudden fever. The treatment for sore throats caused by bacteria provides antibiotics .

Tuberculosis. It is a bacterial infection that affects the lungs.
The symptoms caused by tuberculosis are:

  • Fever,
  • Chills,
  • Cough that lasts up to 3 weeks,
  • Weight loss , etc.

Meningitis. Viral infections that cause meningitis usually improve without treatment.
However, bacterial meningitis is very serious and dangerous. The meningitis causes symptoms such as:

Kidney infection . A kidney dysfunction can cause toxins to build up in the body.
During urinary tract infections, the symptoms that occur are chills and fever, for example in case of  pyelonephritis .

Cancer. Many cancers cause fever and chills. However, these symptoms are more common in the case of:

Pelvic Inflammatory Disease
Bacterial infection in the upper genital tract (uterus, ovaries, and fallopian tubes) is called pelvic inflammatory disease.
Among the causes of this disease are:

Symptoms include fever and chills.

Appendicitis. The pain in the lower abdomen may indicate a severe case of appendicitis is accompanied by fever, chills and other symptoms such as:

In this case, it is possible to perform surgery to remove the appendix from the body.

Joint disease : Some joint disorders, such as rheumatoid arthritis , can cause:

AIDS. AIDS patients have a weak immune system.
They run the risk of easily having an infection.
A person with a compromised immune system is more prone to chills and fever than others.

Other causes of chills are:

Infections, such as:


Chills and fever

Symptoms that can occur with chills

Chills often occur with other symptoms, which vary depending on the underlying disorder or illness.
Symptoms that can occur with chills include:


Chills during pregnancy

While some discomfort is a regular feature of a healthy pregnancy, other disorders can be a problem.
Chills during pregnancy may be a symptom of a disease that needs treatment.

Chills usually occur in cases of frequent illnesses that cause an increase in body temperature, such as colds and flu .
It is possible to feel cold in a moment and soon afterwards heat.
The  sweating often accompanies the chills.

Typically, fever and chills are symptoms of an infection.
We may have chills because of a viral infection such as gastroenteritis or intestinal flu.
However, chills and fever may be a more serious infection symptom, such as:

Urinary tract infections often affect pregnant women and can cause:

Among the dangerous causes of chills are kidney infections that can cause an early delivery or an abortion.

Treatment for Chills During Pregnancy
Although over-the-counter drugs such as ibuprofen and paracetamol may help reduce fever, it is important to have medical approval before taking any over-the-counter medication during pregnancy.
Depending on the severity and duration of the child’s fever or developmental phase, the doctor may do some tests to determine the cause of the fever, such as:

Bacterial infections (for example, urinary tract and breast diseases) often require a course of oral antibiotics.


Postpartum chills

Chills overnight at early lactation
After delivery chills may be caused by the onset of lactation, ie the period during which the udder milk becomes ripe for breastfeeding.
This phenomenon occurs in the first week after birth and can be accompanied by chills at night in bed.

If you suffer from chills after childbirth and have a high fever, you may have a vaginal or uterine infection.
It is important to seek medical advice immediately.

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