What Is Intermittent Fever?
Intermittent fever refers to a fever pattern where the body temperature rises above normal for a certain period, then returns to normal, only to rise again after a period of time. This cycle repeats, often over days or weeks. It’s commonly seen in specific infections and medical conditions.
This fever pattern helps in diagnosing the underlying cause, as it differs from continuous or remittent fever.
What Causes Intermittent Fever?
Intermittent fever is often a symptom of an underlying illness. Common causes include:
Infectious Causes:
- Malaria – classic example with fever spikes every 48–72 hours
- Tuberculosis (TB)
- Sepsis or bloodstream infections
- Brucellosis
- Visceral leishmaniasis (Kala-azar)
Non-Infectious Causes:
- Autoimmune diseases (e.g., lupus, Still’s disease)
- Certain cancers, such as lymphomas
- Drug-induced fevers
The specific pattern and timing of fever can provide important clues to the diagnosis.
What Are the Symptoms of Intermittent Fever?
Symptoms vary depending on the underlying cause but may include:
- Periodic rise in body temperature
- Chills and shivering before fever spikes
- Sweating as fever subsides
- Fatigue or malaise
- Headache, body aches, or joint pain
- Other specific symptoms like cough, abdominal pain, weight loss, or night sweats
Monitoring the fever pattern can help track progress or detect complications.
How Is Intermittent Fever Diagnosed?
Diagnosis focuses on identifying the root cause through:
- Detailed medical history (including travel, insect bites, exposure to infections)
- Physical examination
- Fever charting over several days
- Blood tests (CBC, malaria smear, blood cultures)
- Urine analysis
- Chest X-ray or abdominal ultrasound, if needed
- Tuberculin skin test, serology, or PCR for specific infections
Additional testing is guided by the suspected diagnosis.
How Is Intermittent Fever Treated?
Treatment depends on the underlying cause:
- Malaria: Antimalarial medications (like artemisinin or chloroquine)
- Tuberculosis: Multi-drug antibiotic therapy
- Bacterial infections: Appropriate antibiotics
- Autoimmune diseases: Anti-inflammatory or immunosuppressive drugs
- Cancers: Specific oncological treatment
Supportive care may include:
- Paracetamol or ibuprofen to reduce fever
- Hydration
- Rest
Early diagnosis and appropriate treatment usually lead to good outcomes.
Is Intermittent Fever Serious?
It can be serious, depending on the cause. Infections like malaria or sepsis can become life-threatening if not treated promptly. Chronic intermittent fevers may signal serious underlying illnesses like TB or cancer.
It’s essential to seek medical evaluation if fever lasts more than a few days or is accompanied by other symptoms.
Can Intermittent Fever Be Prevented?
Yes, some causes are preventable:
- Use mosquito nets and repellents to avoid malaria
- Practice good hygiene and sanitation
- Avoid contaminated food and water
- Vaccination against diseases like typhoid or TB where appropriate
- Prompt treatment of infections to avoid complications