What does it mean when an elderly person has a fever that won't go down?

Fever refers to an elevated body temperature. In elderly individuals, persistent fever is generally caused by conditions such as the common cold, bronchitis, pneumonia, tuberculosis, or rheumatoid arthritis. Active treatment is recommended.

1. Common Cold

The common cold is caused by a viral infection leading to inflammation of the upper respiratory tract mucosa. The immune system's response against pathogens can increase heat production in the body. Due to weakened immune function in the elderly, they may be unable to effectively resist viruses, resulting in prolonged fever lasting several days, along with symptoms such as runny nose and sneezing. Antiviral medications such as ribavirin capsules, ribavirin granules, or acyclovir tablets may be used under medical guidance to suppress viral replication and help shorten the duration of illness.

2. Bronchitis

Bacterial or viral colonization of the bronchial mucosa can trigger an inflammatory response via the immune system, causing elevated body temperature. Symptoms may include cough, sputum production, and wheezing. Because elderly individuals have lower metabolic rates and weaker immunity, the condition may recur easily, manifesting as recurrent fever. It is important to strictly follow medical advice regarding timing, dosage, and duration when taking antibiotics. Commonly used medications include levofloxacin hydrochloride capsules, roxithromycin capsules, and compound sulfamethoxazole tablets, which inhibit bacterial growth and promote recovery.

3. Pneumonia

Elderly individuals often have relatively low immune function, making them susceptible to pathogen infections that cause inflammation of the lung mucosa. This triggers an immune response, producing inflammatory substances that stimulate heat production, resulting in prolonged fever that is difficult to reduce. Symptoms may also include cough, sputum production, and shortness of breath. Antibiotics should be used under a doctor’s supervision. Commonly prescribed medications include amoxicillin capsules, cefixime capsules, and cefuroxime axetil tablets, which help inhibit or eliminate bacteria, control infection, and promote recovery.

4. Tuberculosis

After infection with Mycobacterium tuberculosis, individuals with compromised immune systems may be unable to resist the infection, leading to long-term low-grade fever, along with symptoms such as cough, sputum production, and hemoptysis (coughing up blood). Anti-tuberculosis medications should be taken as prescribed by a physician. Common drugs include rifampicin tablets, isoniazid tablets, and pyrazinamide tablets, which inhibit the synthesis of Mycobacterium tuberculosis, control disease progression, and support recovery.

5. Rheumatoid Arthritis

Rheumatoid arthritis may develop due to factors such as autoimmune dysfunction and genetic predisposition. Inflammatory mediators can cause joint swelling, pain, and functional impairment. In severe cases, the inflammatory response may persist for a prolonged period, leading to chronic fever. Under medical guidance, nonsteroidal anti-inflammatory drugs (NSAIDs) may be used. Common medications include ibuprofen sustained-release capsules, acetaminophen tablets, and diclofenac sodium sustained-release tablets, which help reduce inflammation, lower body temperature, and relieve pain. Additionally, disease-modifying antirheumatic drugs (DMARDs), such as methotrexate tablets, leflunomide tablets, and sulfasalazine enteric-coated tablets, may be combined to slow joint and bone destruction and improve overall disease outcomes.

Due to the unique physiological characteristics of the elderly, it is advisable to seek timely and proper medical care at a hospital upon experiencing any discomfort, to prevent disease progression and the development of additional complications.