What should you know about sudden body aches and chills?

Inflammatory signals released during an infection can make muscles feel sore and cause the body to shiver while it adjusts temperature. Influenza and COVID-19 may bring aches with fever, cough, sore throat or congestion. Dengue Fever and malaria need consideration after relevant travel or mosquito exposure, particularly with fever, headache or marked weakness. Brucellosis can be linked with unpasteurised dairy or animal exposure.

Aches that persist without an acute illness can have other explanations, including Fibromyalgia, Long COVID or Hypothyroidism. The pattern, duration, temperature, exposures and accompanying symptoms help a clinician narrow the cause; body aches alone do not identify one condition.

Rest, drink fluids regularly and wear light layers if you feel hot, while keeping warm during active shivering. Check your temperature if possible and record when the aches started. Reduce close contact with others if an infection is possible, and consider local testing advice for respiratory symptoms. Use only pain or fever medicine that is suitable for you and follow its label; ask a pharmacist if you have liver, kidney, stomach or pregnancy concerns.

Get urgent help for trouble breathing, chest pain, confusion, fainting, a stiff neck, a seizure, severe weakness, blue or grey lips, or inability to keep fluids down. Seek prompt medical advice after travel to a malaria area, after a tick or animal exposure, or when fever and aches are intense, persistent or worsening. People who are pregnant, older, immunocompromised or living with major chronic illness should seek advice earlier.

Tell your doctor when the aches and chills began, your measured temperature, respiratory or urinary symptoms, recent travel, insect bites, animal contact, new medicines and sick contacts. Ask whether you need an examination, swabs, blood tests or travel-related testing, and which symptom changes should trigger urgent review.