VHOSPITAL.CLINIC · Medical Q&A

What Causes Chills?

A complete overview of all potential causes of chills, from benign to serious medical conditions.

What It Means

Chills has many potential causes spanning multiple organ systems. A systematic approach — considering the character, timing, triggers, and associated symptoms — helps identify the most likely cause and guides appropriate management.

Common Causes

  • Infectious causes: viral, bacterial, or fungal pathogens triggering systemic or localised chills
  • Inflammatory/autoimmune: the body's immune response producing chills as a bystander effect
  • Metabolic: disorders of thyroid, adrenal, or blood glucose regulation
  • Structural/mechanical: nerve compression, joint damage, or organ enlargement
  • Underlying conditions: Endocarditis, Malaria, Sepsis are among the leading identifiable causes

Red Flags — When to Act

  • Unintentional weight loss accompanying chills (possible malignancy or metabolic disease)
  • Night sweats, fever, and chills persisting >2 weeks
  • New chills in someone with a known cancer, immunosuppression, or recent surgery
  • Rapid progression or change in the character of long-standing chills
  • Family history of serious hereditary conditions presenting with chills

What to Do Now

  1. 1.Keep a symptom diary: date, time, severity, triggers, and what improves or worsens chills
  2. 2.Review your medications — many drugs can cause chills as a side effect
  3. 3.Assess lifestyle factors: sleep, diet, alcohol, exercise, and hydration
  4. 4.Use our AI symptom checker to receive a structured differential and guidance
  5. 5.Book a GP appointment for persistent, recurring, or unexplained chills

When to See a Doctor

  • Chills persists beyond 1 week without an obvious cause
  • Severity is moderate-to-severe or worsening over time
  • Any red-flag features are present (see above)

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Frequently Asked Questions

What is the most common cause of chills?

The most common causes of chills in the general population are stress, dehydration, poor sleep, and minor infections. In specific populations, Endocarditis and other underlying conditions account for a significant proportion of cases.

Can medications cause chills?

Yes — many medications list chills as a potential side effect. Common culprits include antihypertensives, antibiotics, NSAIDs, and hormonal treatments. Review your medication list with a pharmacist or doctor if you suspect a drug-related cause.

Is chills always related to a physical cause?

No. Psychological conditions such as anxiety, depression, and stress disorders frequently produce genuine physical chills through the mind-body axis. Psychosomatic chills is a real, measurable phenomenon requiring appropriate treatment.

Related Resources

Possible Causes

  • Infectious causes: viral, bacterial, or fungal pathogens triggering systemic or localised chills
  • Inflammatory/autoimmune: the body's immune response producing chills as a bystander effect
  • Metabolic: disorders of thyroid, adrenal, or blood glucose regulation
  • Structural/mechanical: nerve compression, joint damage, or organ enlargement
chillsFull symptom guide

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Medical ReviewvHospital Editorial Team · 2024–2025
Sources:WHOPubMedUpToDateNICE