Fever is an increase in body temperature to 38 ° C or more. It is a measure of the body's immune system to get rid of disease-causing pathogens. The duration of fever depends on the condition underlying the fever.

How long does fever last?

The duration of fever largely depends on the causative disorder. Sometimes the duration of the fever gives indications of possible causes of illness.

If fever lasts two to three days, it is difficult to draw conclusions about the cause of the fever. In this case, the concomitant symptoms are essential to make a diagnosis. A pneumonia or a cold come into question.

If fever persists for more than five to seven days, the fever curve can be better understood. In rubella, a rash occurs on the first day of the fever, in Schlarlach in the first three days. In measles, a rash typically occurs on the fourth to fifth fever days.

In a salmonella disease, chronic inflammation of the liver and biliary tract or in Pfeiffer's glandular fever, the fever persists for more than two weeks.

Fever can even last for months. Monthly fever occurs in conditions such as familial Mediterranean fever or other fever syndromes, such as inflammation of the prostate or epididymis.

This means that there are many causes of fever, and depending on the cause, fever may last for a few days to months.

What factors affect the duration of fever?

Fever is caused by a setpoint shift in body temperature in the hypothalamus of our brain. Bacteria and their toxins (toxins) activate the immune system. The breakdown products of the body's own cells cause the release of messenger substances, the prostaglandins.

Prostaglandins play an important role in the development and duration of fever, as they lead to a setpoint shift in the hypothalamus. The incidence and amount of bacteria and toxins, endogenous degradation products and prostaglandins affects the duration of fever.

In addition, stress, age, health and metabolism play a role in the duration of fever.

What can I do to reduce the duration of the fever?

If you suffer from fever, bed rest is one of the most important home remedies. Stress should be avoided to reduce the duration of a fever. Physically strenuous activities such as sports and heavy lifting should be avoided.

When you are ill, you need a lot of sleep and rest. A healthy lifestyle and a balanced diet have a positive effect on health and discomfort such as fever.

You can reduce the duration of a fever by taking antipyretic drugs. Paracetamol inhibits the formation of prostaglandins and acts effectively against fever. By another mechanism, the agent acetylsalicylic acid (Aspirin®) intervenes in the formation of prostaglandins and has an antipyretic (antipyretic) effect. In addition, home remedies such as calf wrap, hot tea and apple cider vinegar counteract the fever.

Duration of fever after a baby vaccination

Vaccinations are recommended for babies to protect children from harmful agents. The vaccines are generally well tolerated. Nevertheless, especially after multiple vaccines or life vaccines, physical reactions may occur.

In addition to an inflammatory reaction at the injection site with redness, swelling and pain, fever may occur. When it comes to a fever after vaccination in the baby, it usually sounds like this after a few days.

To lower the fever, paracetamol suppositories are suitable for babies. If the fever lasts longer than a few days, you should consult the pediatrician and have your baby examined for other causes of the fever.

Duration of fever while teething

Teething in children may be accompanied by increased body temperature or fever. The fever should subside after a few days. If the fever lasts longer, you should consult the pediatrician to rule out an infection as the cause of the fever.

Duration of a rheumatic fever

Rheumatic fever refers to an autoimmune reaction that can occur several weeks after a bacterial infection. Rheumatic fever causes various symptoms, often inflammation of the joints, skin and heart. Even though the condition is called rheumatic fever, it does not mean that there is an obligate fever. Fever can be a symptom of rheumatic fever, but it does not have to occur. The fever can last for different lengths of time and depends largely on the course of the disease and the therapy.

Duration of fever with brochitis

Acute bronchitis refers to inflammation of the mucous membranes in the bronchi of the lung. Frequently, viruses are responsible for the disease and cause complaints such as coughing with sputum and fever. Without treatment, most symptoms disappear in a healthy child at the latest after two weeks, while the cough often lasts longer. The fever can get high with bronchitis, but should not last longer than a week. If there are comorbidities, immunodeficiency or other risk factors such as old age, the fever may last longer. High fever should be lowered as part of acute bronchitis with antipyretic drugs.

Duration of fever in a viral infection

Fever often occurs as part of viral infections. Most of the time it sounds like this after a few days.

The flu, for example, is a common viral infection associated with fever. In addition, there are many different viruses that cause fever among other things.

Fever can also occur with pneumonia caused by viruses. Infection with mumps viruses can also lead to elevated temperatures.

The duration of the fever in a viral infection depends on the form of the disease and the general state of health of the person affected. There are several forms of viral infections that are associated with elevated temperatures and fever, with the fever lasting for varying amounts of time.

Duration of fever with a flu

The real flu (influenza) is a serious virus-related infectious disease with inflammation of the respiratory tract, tiredness, fatigue and fever. Temperatures between 38.5 and 40 ° C are characteristic of a flu.

An influenza lasts about 7 to 10 days in an otherwise healthy person, while the fever usually lasts from the 3rd to the 5th day. When the fever starts and how long it actually takes depends on the state of health and the risk groups.

The duration of the fever may be prolonged with influenza, when people are chronically ill and / or suffer from a weakened immune system.
A second infection with bacteria, a complication-rich disease course and risk groups, ie children and old, weak people, can also lead to a prolonged fever in the context of the flu.

Duration of fever in pneumonia

Pneumonia is often associated with difficulty breathing, chills and fever. Especially with bacterially caused pneumonia there is a rapid increase in body temperature.

The fever can reach 40 ° C. Without antibiotic therapy, body temperature drops at the end of the first week of illness.

The fever can last for more than a week, when complications of pneumonia occur. In comorbidities, old age and immunodeficiency, the fever can last longer and urgently requires a drug therapy.

Duration of fever with a cold

A cold (flu-like infection) causes coughing, runny nose, hoarseness, headache and body aches. Unlike a flu, the symptoms of a cold creep slowly and the flu-typical high fever usually remains.

Nevertheless, temperatures above 38.5 ° C for colds occur. The fever is usually harmless and ends with the common cold, that is about three to seven days.

In healthy people, a cold is overcome after two weeks at the latest. If there are complications, immunodeficiency or comorbidities, the fever may last longer than a week if you have a cold.

Duration of fever with tonsillitis

An tonsillitis (tonsillitis) often causes fever. Adults in tonsillitis are less prone to fever than children. If tonsillitis is treated properly, the symptoms resolve after a few days. This means that the fever should have subsided after one week. If it lasts longer, it should be investigated if there is another cause of body temperature.

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