Frequent colds with fever may be the result of poor physical condition, malnutrition, anemia or micronutrient deficiencies and other causes of poor physical condition of the population, vulnerable to bacterial or viral attack, resulting in colds and fevers, in addition to the need to rule out the possibility of immunodeficiency. 1. People who usually eat very little, are picky about what they eat or have poor digestion and absorption, leading to malnutrition are usually in poor physical condition. Poor physical condition may lead to frequent colds and fevers because once bacteria and viruses invade, they may cause colds. 2. People who are anemic due to iron deficiency or poor hematopoietic function are usually pale, weak and in poor physical condition, and they are also susceptible to repeated invasion by bacteria and viruses, resulting in frequent colds and fevers. 3. Too little intake of calcium, zinc and other trace elements, resulting in the lack of trace elements, may lead to poor health, the body’s immunity significantly reduced later may be frequent colds and fevers. In addition, part of the combination of primary immunodeficiency diseases may appear frequent colds with fever, it is recommended that patients can go to the hospital, to the hospital for relevant examinations, to determine the specific cause of the disease and then treatment.