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Types of Fever

Types of Fever

Fever can be triggered by several factors, including infections, nervous system disorders, certain cancers, blood diseases like leukemia, embolism, thrombosis, heatstroke, dehydration, surgical trauma, crushing injuries, and allergic reactions.
Here are the different types of fever:

Increased Body Temperature

Increased Body Temperature

A body temperature above 38°C (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in...

Patterns of Fever

Patterns of Fever

Before understanding the types and patterns of fever, it is essential to know its phases.

Methods of reducing fever

Methods of reducing fever

The signs and symptoms of fever include hot and dry skin, flushed face, thirst, muscle aches, anorexia, headache, tachycardia, tachypnea, and fatigue. Elevated body temperature is reduced using two methods: pharmacological and nonpharmacological. Proper identification and treatment of the root cause of a fever is of utmost importance.
Pharmacological Methods of Reducing Fever:

Vaccinations

Vaccinations

Acute Pharyngitis

Acute Pharyngitis

Introduction
Acute pharyngitis is the inflammation of the back of the throat (pharynx), commonly resulting in a sore throat. It is a frequently encountered condition that prompts individuals to seek medical advice.
Classification
Acute pharyngitis can be categorized based on its underlying cause:

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Related Experiment Video

Updated: Dec 24, 2025

Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses

Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses

Published on: November 10, 2023

Fever and Rash: A Changing Landscape in the 21st Century.

Dimitri Laddis¹, Hnin Khine¹, David L Goldman²

¹Division of Pediatric Emergency Medicine, Albert Einstein College of Medicine, Children's Hospital at Montefiore, Bronx, NY.

Clinical Pediatric Emergency Medicine

|April 15, 2020

Summary

This summary is machine-generated.

Fever and rash in children often has benign causes, but severe conditions like meningococcemia are concerning. New threats like measles and bioterrorism agents require updated evaluation strategies for pediatric fever and rash.

Keywords:

anthrax emergency fever measles meningococcemia rash smallpox staphylococcus streptococcus

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Last Updated: Dec 24, 2025

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Area of Science:

Pediatrics
Infectious Diseases
Emergency Medicine

Background:

Fever and rash is a frequent pediatric emergency department complaint, with most cases being benign.
Vaccination programs have reduced severe causes, but new challenges have emerged.
Invasive meningococcal disease vaccines offer future promise.

Purpose of the Study:

To highlight emerging concerns in evaluating pediatric fever and rash.
To update the differential diagnosis for febrile exanthema in the current medical landscape.

Main Methods:

Review of current literature and clinical trends.
Analysis of changing epidemiology of infectious diseases in children.
Discussion of novel threats including bioterrorism agents.

Main Results:

While meningococcemia remains a concern, other diseases like measles are resurging.
Emergence of antibiotic-resistant Staphylococcus aureus and invasive group A streptococcal disease presents new challenges.
Bioterrorism agents such as anthrax and smallpox are now considered in fever and rash evaluations.

Conclusions:

The landscape of fever and rash in pediatric emergency departments has evolved significantly.
Clinicians must consider a broader differential diagnosis, including vaccine-preventable diseases, resistant bacteria, and bioterrorism agents.
Updated evaluation protocols are necessary to address 21st-century concerns.