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What causes low-grade fever

2026-01-13 19:16:28 healthy

What causes a low-grade fever? ——Analysis of common causes and solutions

A low-grade fever (body temperature between 37.3°C and 38°C) may be a health signal sent by the body, and there are many potential causes behind it. The following is a structured analysis related to low-grade fever among the health topics hotly discussed on the Internet in the past 10 days to help you quickly understand possible triggers and countermeasures.

1. Classification of common causes of low-grade fever

What causes low-grade fever

Categoryspecific reasonsTypical symptoms
infectious agentsViral/bacterial infections (such as influenza, urinary tract infections)Accompanied by cough, sore throat, or discomfort with urination
inflammatory diseasesRheumatic immune diseases, tuberculosisJoint pain, long-term afternoon low fever
neoplastic diseaseLymphoma and early leukemiaweight loss, night sweats
physiological factorsDuring ovulation and after strenuous exerciseShort-term elevated body temperature (<24 hours)

2. Low-grade fever cases related to recent hot searches

timehot eventscorrelation analysis
2023.11.15High incidence period of mycoplasma pneumoniaPersistent low-grade fever + paroxysmal cough in children
2023.11.18Seasonal flu vaccine out of stockUnvaccinated people are more likely to develop low-grade fever after infection
2023.11.20Workplace Overwork Health WarningDecreased immunity leads to repeated low-grade fever

3. Danger signs to be alert to

When a low-grade fever is accompanied by the following symptoms, it is recommended to seek medical attention immediately:

1.Lasts more than 1 weekunprovoked low-grade fever

2. WeightDecline >5% in one month

3. appearUnknown bruising or swollen lymph nodes

4. NightProfuse night sweatsAffect sleep

4. Home care suggestions

measuresSpecific methodsThings to note
physical coolingWarm water bath (avoiding the chest and back)Alcohol wiping is prohibited
HydrationDrink more than 2000ml of water dailyDrink small amounts frequently
Body temperature monitoringMeasure 3 times a day at fixed timesRecord fluctuation curve

5. Latest medical research trends

According to the latest research from The Lancet:

1. Among patients with long-term low feverabout 12%Have an autoimmune disease

2. After infection with new coronavirus mutant strain37.2%The patient's first symptom was low-grade fever

3. Artificial intelligence body temperature analysis system can improve19%The accuracy of diagnosing the cause of low-grade fever

Summary:A low-grade fever may be an early warning signal from the body, so there is no need to be overly nervous or take it lightly. It is recommended to make a comprehensive judgment based on other symptoms and seek medical examination in time if it persists for more than 3 days. Maintaining a regular schedule and a balanced diet are effective ways to prevent non-pathological low-grade fever.

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