{"id":346,"date":"2026-01-27T13:21:30","date_gmt":"2026-01-27T04:21:30","guid":{"rendered":"https:\/\/clinicten.jp\/zh-cn\/?page_id=346"},"modified":"2026-03-31T18:07:49","modified_gmt":"2026-03-31T09:07:49","slug":"fever","status":"publish","type":"page","link":"https:\/\/clinicten.jp\/zh-cn\/internal-medicine\/internal-symptoms\/fever\/","title":{"rendered":"Fever"},"content":{"rendered":"
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Content Supervision<\/p>

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KOMAI TSUBASA<\/p>\n

KOMAI TSUBASA<\/p> <\/div>\n <\/div>\n

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KOMAI TSUBASA<\/p>\n

KOMAI TSUBASA<\/p> <\/div>\n

Physician \/ Board-Certified Internist (Japanese Society of Internal Medicine) \/ Board-Certified Interventional Cardiologist (Japanese Association of Cardiovascular Intervention and Therapeutics) \/ ECG Certification Level 1<\/p>

I have worked diligently as a young physician on the front lines of cardiovascular emergency medicine. While I feel an “immense sense of fulfillment” when patients brought in by ambulance successfully return to their normal lives, I have also witnessed many cases of “the ultimate consequences of lifestyle diseases” that could not be saved.\r\nI aspire to be a family doctor whom patients can consult as casually as they would a friend, with the goal of helping people before it’s too late. I am also involved in medical education to improve health literacy among the Japanese public.<\/p> <\/div>\n\t<\/div>\n<\/div>\n<\/div>\n\n\n

What are the symptoms of fever?<\/h2>\n\n\n\n

Medically, a fever is defined as a body temperature of 37.5\u00b0C or higher. However, because body temperature varies from person to person, a temperature below 37.4\u00b0C can also be considered a fever. In most cases, fever is caused by infection or inflammation, but there may also be complex underlying causes such as collagen disease, cancer, or endocrine abnormalities. Sometimes fever occurs as a normal response when the body is infected with bacteria or a virus and fights the microorganisms that cause the infection, so it is not necessarily bad for the body, and the idea that “all you need to do is lower the fever” is beginning to be reconsidered.<\/p>\n\n\n\n

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Things to keep in mind when you have a fever<\/h2>\n\n\n\n

Even if you visit a hospital immediately after the onset of a fever (such as within a day), the cause of the fever is often unknown. If you have a fever but no other symptoms such as loss of consciousness or difficulty breathing, you should consider using over-the-counter antipyretics or general cold medicines, and visiting a general outpatient clinic during the day from the day after symptoms appeared.<\/p>\n\n\n\n

Also, since it is easy to become dehydrated when you have a fever, try to drink small amounts of fluids containing electrolytes and carbohydrates, such as sports drinks. If you have symptoms such as drowsiness or difficulty breathing in addition to a fever, you should immediately seek medical attention.<\/p>\n\n\n\n

Possible causes of fever<\/h2>\n\n\n\n

Infectious disease<\/h3>\n\n\n\n

Most fevers are caused by bacterial or viral infections. If you were feeling fine for a few hours to a few days and then suddenly developed a fever, it is likely an infectious disease. Even if you have an infectious disease, it is most likely a cold or flu, but if you have any of the following symptoms, there is a possibility that another illness is lurking.<\/p>\n\n\n\n