What is a low-grade fever?

Fever is a very common symptom in our lives. The cause of fever is related to inflammation in the body. Some people are prone to low fever when they have a fever. When they have a low fever, they should try to choose physical cooling methods, because the side effects of physical cooling methods are very small. It can quickly cool down the patient's body. So what is low fever?

1What is a low-grade fever?

Fever is a symptom. Diseases such as rheumatism, tuberculosis, chronic inflammation, and low immunity can cause persistent low fever. Long-term psychological stress and emotional instability can also cause disorders in the body temperature center, resulting in persistent low fever of unknown cause. A problem with any system in the body can cause a persistent low-grade fever. It is difficult to find out the cause of low-grade fever through routine tests such as blood, urine, and stool. Some low-grade fevers caused by bacterial infections can only be detected through bacterial culture.

Low-grade fever is misunderstood by many people. A temperature lower than the normal body temperature is considered a low-grade fever. A low-grade fever is a fever symptom that is slightly higher than the normal body temperature. Sometimes you cannot tell whether the patient has a fever just by touching his forehead. It needs to be measured with a thermometer.

The symptoms generally include lack of energy, loss of appetite, chills, and some discomfort in the muscles of the joints of the hands and feet.

Do not abuse medicine for unexplained low-grade fever. Fever is one of the body's responses to disease. Taking antipyretics for patients with low fever is not conducive to the treatment of the disease. Indiscriminate use of antipyretics may also lead to a decrease in white blood cells and aplastic anemia. Antipyretics should only be considered when the body temperature is above 38°C.

2 Causes of low-grade fever

Causes of persistent low-grade fever:

Fever is a symptom. Diseases such as rheumatism, tuberculosis, chronic inflammation, and low immunity can cause persistent low fever. Long-term psychological stress and emotional instability can also cause disorders in the body temperature center, resulting in persistent low fever of unknown cause. A problem with any system in the body can cause a persistent low-grade fever. What is the cause of low-grade fever? It is difficult to find out through routine tests such as blood, urine, and stool. Some low-grade fevers are caused by bacterial infections.

There are many reasons for long-term low fever in patients, which can be roughly divided into three categories:

The first is infectious low-grade fever, which is the most common in life, accounting for about 40%. Among all infectious low-grade fevers, tuberculosis infection is the most common. Tuberculosis infection is manifested by low fever in the afternoon, which may also be accompanied by cough, fatigue, sweating at night or after waking up, etc. Long-term low fever caused by chronic biliary tract infection, chronic pyelonephritis, chronic urinary tract infection, chronic pelvic inflammatory disease, chronic otitis media, chronic sinusitis, AIDS, subacute endocarditis and viruses is also common.

The second is non-infectious fever, including hyperthyroidism, rheumatic fever, lupus erythematosus, blood disease, tumor, drug fever, etc.

The next type of fever is functional fever, which is more common in young women and children under 3 years old. Fever mainly occurs in the morning and may also be accompanied by sweating, hand tremors, insomnia, fatigue, and loss of appetite.