Cold is the most common disease in childhood, often accompanied by fever, cold fever is also the most common reason for pediatric clinic visits. 37 ℃ – 38 ℃ is low fever, 38.1 ℃ to 39 ℃ is moderate fever, 39.1 ℃ to 40 ℃ is high fever, 40 ℃ or more is ultra-high fever. Once parents find that their children have a fever, they are anxious to give their children cold medicine, anti-inflammatory drugs, antipyretic drugs and even injections in a three-pronged way. Here to give parents a science of cold and fever treatment. Fever itself is a protective response of the body against pathogenic bacteria. The pathogen enters the body and the body clears the pathogen by mobilizing the immune response, so fever appears. Common cold fever may last 1-3 days and the baby is in good spirits, which means the condition is not serious. So fever itself has no adverse effect on the body, it is mainly the disease itself that affects the body. 80% to 90% of colds are caused by viral infections, and the rest may be caused by infections such as bacteria, other microorganisms such as mycoplasma, or bacterial infections secondary to viral infections. So the majority of cold and fever is not necessary to apply antibiotics, symptomatic treatment can be applied to reduce fever drugs. The safe and effective antipyretic drugs for children are ibuprofen or acetaminophen. Acetaminophen is indicated for children over 3 months of age and ibuprofen is indicated for children over 6 months of age. Some children, especially those under three years of age, may have fever and may have convulsions that require prompt medical attention. If a child under three months old has fever, special attention is needed because the blood-brain barrier is not well developed in children under three months old, and some infections may cause sepsis and meningitis. A high white blood cell count and high C-reactive protein are considered bacterial infections, and the appropriate antibiotics can be administered orally or intravenously under the guidance of a physician. It is also very important to take care of the child during the fever period, let the child drink more water, get enough rest and sleep, and give light and easily digestible food. Give nasal care to small infants with nasal congestion, apply saline and remove nasal secretions in time. There are a wide range of pediatric cold and flu medications, most of which are compounded and may contain antipyretics, anti-allergy medications, cough and phlegm medications, adrenaline-like medications, etc.. The toxicity of multiple drugs taken together increases, often easily causing liver and kidney damage in children. So children with cold and fever should not blindly take cold medicine, antibiotics, etc. Learn the correct treatment and care methods. At the same time, if you are not sure whether it is a simple cold or a combination of other diseases, you need to go to the hospital.