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Why does a fever occur? .. What are its types and common symptoms?

Fever is one of the most common health ailments that affects everyone from infants to the elderly, it can also be a symptom of an underlying health condition so it should be taken seriously, but most people do not know that there are multiple types of fever that can occur in The human body, which is divided into 5 categories according to its role, severity, temperature and some other factors, according to the report published on the “Onlymyhealth” website.

Why does fever occur?


Fever is a natural reaction to any foreign substance in the body. When an attack occurs, whether bacteria, viruses, parasites, etc., your body allows its natural defenses to work on it and raise the body temperature to fight the foreign body and make it weak, and once the problem ends, the body temperature returns to normal.

What are the 5 types of fever and the causes of their occurrence?

1- Intermittent fever

This type of fever means that your body temperature changes between day and night. The body temperature remains normal during the day but rises at night. This is due to parasites or bacterial infections, and sometimes it can be caused by malaria or skin poisoning.

What are the symptoms of intermittent fever?


High temperature at night

Shivering and vomiting


Stomach pain or body aches

2- Sudden high fever


It occurs with most people. It is also known as normal fever. It occurs when the body temperature rises due to normal lifestyle problems such as stress, fatigue, body aches, etc. In this type, the temperature usually drops within a day or two.

What are the symptoms of sudden high fever?


body aches




3- Persistent fever


This is a condition that can be a medical concern, as the name suggests, the body temperature remains about 1-2 degrees higher than normal and does not fluctuate much, this type of fever may result from an underlying health problem due to pneumonia, urinary tract infection, or typhoid fever , and others, and complications may occur not treated in time.

Its symptoms mostly depend on the health problem that caused the persistent fever, such as:

The body temperature remains elevated for several days

There is no fluctuation in body temperature

Symptoms of other diseases begin to appear

Feeling weak and tired

4- deficient fever


This type is similar to persistent fever, but cases can be more severe in this type of fever, and it is caused by bacterial infection, parasites, etc., and therefore it causes great threats to the body, especially among children, and deficient fever can also occur due to inflammation in the internal tissues for the heart.

What are the symptoms of deficient fever?




Irregular bowel movements



High temperature


5- Rheumatic fever

This type of fever is usually caused by one type of bacteria known as streptococcus, which starts with a sore throat and turns into a painful fever if not treated in time. Rheumatic fever can cause serious medical problems and is very annoying and affects your daily routine. .

What are the symptoms of rheumatic fever?


strong headache

body aches


Tissue and tonsillitis