Fever inevening
Fever in the evening is a common symptom. Here are the key points based on general medical knowledge:
Evening/Quotidian Fever Pattern - fever that spikes in the late afternoon or evening and is lower (or normal) in the morning is a well-recognized clinical pattern. Normal body temperature follows a circadian rhythm, peaking between 4-6 PM, so even mild infections can produce noticeable fever in the evening.
Common Causes:
- Viral infections (common cold, flu, COVID-19)
- Bacterial infections (UTI, pneumonia, tonsillitis)
- Tuberculosis (classic "evening rise" of temperature)
- Lymphomas and other malignancies
- Inflammatory conditions (rheumatoid arthritis, SLE)
- Typhoid fever (stepladder pattern, often worse in evening)
Worrying features: fever >103°F (39.4°C), lasting >3 days, associated with night sweats, weight loss, or localized symptoms.
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