Elevated body temperature and shivering due to infection.
At a glance
What it is
Elevated body temperature and shivering due to infection.
Commonly experienced as
Evidence context
Traditional useContext
Fever and chills describe the combination of elevated body temperature (above 38°C) and episodes of shaking, shivering, or extreme coldness that often precede or accompany a fever — reflecting the body's immune response to infection or systemic inflammation. Fever is not itself a disease but a physiological mechanism: elevated temperature inhibits pathogen replication and enhances immune cell function. Chills arise from muscle contractions that generate heat to raise the body temperature to the set-point determined by pyrogens (fever-inducing substances released during immune activation). Fever and chills together are characteristic of bacterial and viral infections, urinary tract infections, pneumonia, malaria, and some autoimmune conditions. Holistic supportive care includes adequate hydration, rest, and electrolyte replacement — fever below 39.5°C in healthy adults typically benefits from being allowed to run its course.
The Evidence
What the evidence says about fever and chills, when to seek care, and how supportive approaches may help.
Fever is a protective mechanism — context determines care
Fever and chills reflect the immune system actively responding to infection or inflammation. Most cases in healthy adults are self-limiting, but certain signs require prompt professional assessment.
Seek prompt care if fever exceeds 39.5°C and does not respond to supportive measures, or if accompanied by confusion, rapid breathing, or rapid heart rate. Fever with a rash, stiff neck, or light sensitivity may indicate a serious condition requiring immediate assessment. These signs go beyond self-care.
The physiology of fever is well understood — elevated temperature inhibits pathogen replication and enhances immune cell activity. Evidence for specific natural or complementary remedies in managing fever and chills is more limited and mixed. Hydration, rest, and electrolyte replacement have consistent support as foundational care.
Current evidence suggests that mild-to-moderate fever in otherwise healthy adults can be allowed to run its course, as suppressing it may blunt immune activity. However, this depends on individual health status, age, and underlying conditions. A qualified practitioner can help determine the appropriate approach for your situation.
Adequate fluid intake is a priority during fever, as elevated temperature increases fluid loss. Some herbal teas and traditional preparations are used across cultures to support comfort during illness, though evidence for specific products varies. These approaches are generally considered supportive rather than primary interventions.
Fever that recurs without a clear cause, lasts beyond a few days, or occurs alongside other unexplained symptoms should be assessed by a qualified health professional. Conditions such as urinary tract infections, pneumonia, and malaria require specific professional management. Complementary approaches are not a substitute for professional assessment in these cases.
Many traditional and complementary approaches for fever and chills have limited high-quality clinical trial data. Where evidence exists, study sizes are often small or findings are inconsistent. This does not mean these approaches lack value, but inflated outcome claims should be viewed with caution. Gyfts does not replace qualified care.
Featured
These practitioners have chosen to be featured on Gyfts.
Read next
References
Educational sources that inform this overview. Inclusion is for context and does not imply endorsement.
Full citations are maintained by the Gyfts editorial team and reviewed periodically.
Keep exploring
Browse verified practitioners, explore honest overviews, and take what you learn to a conversation — at your own pace.
