There are many causes of frequent fever in one-year-old babies. Fever can be caused by the release of toxins stimulated by pathogenic bacteria such as bacteria, viruses or mycoplasma after they have invaded the body. These toxins often invade the respiratory system, and some children often have recurrent respiratory infections, or inflamed, red, swollen or pus-filled tonsils. Other children often get bronchitis or pneumonia, which can lead to repeated fevers, coughs, sneezing and runny noses. Some children also eat unclean food or are fed improperly, which can cause acute gastroenteritis manifestations such as diarrhea, fever, and vomiting. Some children have problems with their blood system and are prone to rising white blood cells, low immunity, and then bacterial infections that can lead to sepsis or septicemia, which can also lead to recurrent fevers.