What are the causes of fever without symptoms?

Fever usually refers to an increase in body temperature. Generally, fever without symptoms may be caused by emotional excitement, drug side effects, infections, gastroenteritis, or autoimmune encephalitis. If physical discomfort occurs, timely medical consultation is recommended, and treatment should be conducted under the guidance of a qualified physician. Detailed explanations are as follows:

1. Emotional excitement: Excessive tension or anxiety may cause sympathetic nerve activation, leading to elevated body temperature. However, this typically does not accompany other symptoms. Appropriate relaxation techniques, such as deep breathing, meditation, or listening to music, may help relieve tension and reduce the fever.

2. Drug side effects: Certain medications, such as antibiotics, nonsteroidal anti-inflammatory drugs (NSAIDs), chemotherapy agents, and hormonal medications, may trigger immune responses that cause fever without other symptoms. Under a doctor's guidance, discontinue suspected medications and monitor whether symptoms improve. If the fever is severe, antipyretics such as ibuprofen sustained-release capsules, acetaminophen tablets, or indomethacin tablets may be taken as directed by a physician.

3. Infection: Invasion of pathogens into the body may trigger immune and inflammatory responses, disrupting the function of the body's temperature regulation center and causing fever without specific symptoms. Depending on the type of infection, treatment may involve antiviral or antibiotic medications such as ribavirin tablets, oseltamivir phosphate capsules, or amoxicillin-clavulanate potassium tablets, as prescribed by a doctor.

4. Gastroenteritis: Gastroenteritis may lead to an inflammatory response in the body, which can cause fever without other symptoms. Under medical guidance, anti-inflammatory medications such as norfloxacin, ciprofloxacin hydrochloride, or cefixime tablets may be used.

5. Autoimmune encephalitis: Autoimmune encephalitis is a rare type of brain inflammation caused by autoimmune mechanisms, which may also lead to fever without obvious symptoms. Patients may receive immunosuppressive treatment with corticosteroids such as hydrocortisone tablets, dexamethasone acetate tablets, or prednisolone acetate tablets under the guidance of a physician.

In daily life, patients are advised to maintain a healthy lifestyle, exercise regularly, quit smoking, limit alcohol consumption, and take medications as prescribed. Additionally, maintaining good dietary habits and consuming more fresh fruits and vegetables, such as apples, tomatoes, and cucumbers, can help prevent the occurrence of diseases.