A fever typically lasts about 3 to 4 days when caused by a viral infection, though it can sometimes last as little as 1 day or as long as 10 days or more depending on the illness. Most fevers resolve on their own within a few days, but a fever lasting longer than 3 to 4 days, recurring fevers, or a fever accompanied by severe symptoms should prompt consultation with a healthcare provider. In children, fevers usually last 2 to 3 days with most viral illnesses, and fevers that persist beyond 5 days warrant medical evaluation. Infants and people with weakened immune systems may need more urgent care for fever management.
Key points:
- Viral fevers often resolve within 3 to 4 days.
- Mild or moderate fevers can last a few hours to several days.
- Persistent or high fevers, or fevers with severe symptoms, require medical attention.
- Fevers in infants and immunocompromised individuals need close monitoring.
- Fever stages include onset, steady high temperature, and decline phases.
If experiencing a fever, it is best to rest, stay hydrated, and monitor symptoms closely.
