Chills and body aches without fever

Muscle aches can follow unusual exercise, poor sleep, dehydration or prolonged tension. Chills may reflect cold exposure or the body's response to an infection before fever develops. Influenza and COVID-19 can present with chills and aches; some people do not record a fever. Persistent widespread pain and fatigue may fit fibromyalgia, while feeling unusually cold with tiredness can occur with hypothyroidism. Travel, unpasteurised dairy exposure or a recent infection may change which causes deserve consideration.

Aches are a symptom, not a diagnosis. Note whether pain is in muscles or joints, whether it is widespread, and whether weakness, sore throat, cough, diarrhoea or a rash accompanies it.

Rest, drink regularly and keep gently mobile if movement does not worsen the pain. Use comfortable layers and check your temperature later if you feel hot, cold or worse. A pharmacist can help you choose a suitable pain reliever after checking allergies, pregnancy, stomach or kidney problems and other medicines. Avoid hard exercise while chills or body aches continue. Arrange an appointment if symptoms persist, recur, or interfere with sleep and daily activities.

Seek urgent help for trouble breathing, chest pain, confusion, fainting, severe weakness, a stiff neck, a rapidly spreading rash or inability to keep fluids down. Prompt assessment is also sensible after significant travel, an animal or unpasteurised-food exposure, or if pain is severe and localised. Do not wait for fever before seeking care when you feel markedly unwell.

Ask whether your pattern suggests a viral infection, thyroid or blood sugar problem, medication effect, muscle condition, or a need for examination and testing.