What causes fever, nausea, and vomiting in children?

Generally speaking, fever refers to an elevated body temperature. Nausea and vomiting accompanying fever in children may be caused by imbalances in temperature regulation, emotional stress, gastrointestinal-type colds, acute gastroenteritis, or upper respiratory tract infections. If symptoms persist, prompt medical attention is recommended. Detailed explanations are as follows:

1. Imbalance in Temperature Regulation

During fever, a child's thermoregulatory center may be affected, leading to elevated body temperature. Additionally, the systemic inflammatory response commonly associated with fever may also affect the digestive system, causing slowed gastrointestinal motility or functional disturbances, which can result in symptoms of nausea and vomiting. Daily care should focus on maintaining a proper balance between warmth and heat dissipation, avoiding overdressing or exposure to cold. A balanced diet, avoiding overeating, and maintaining regular eating habits are also important.

2. Emotional Stress

When children experience discomfort or fear, emotional stress may occur. This stress response can lead to changes in hormone levels within the body, which in turn affect the digestive system, causing symptoms such as fever, nausea, and vomiting. Engaging children in activities like play and storytelling can help them develop emotional management skills and improve their ability to cope with stress.

3. Gastrointestinal-Type Cold

Gastrointestinal-type colds may be caused by viral infections, with common viruses including rotavirus and norovirus. These viruses affect the upper respiratory tract and also invade the gastrointestinal tract, causing inflammatory reactions and digestive disturbances, which lead to the aforementioned symptoms. Associated symptoms may include diarrhea and loss of appetite. Medications such as oseltamivir granules, montmorillonite powder, and Bifidobacterium quadruple live tablets may be used under a doctor's guidance for treatment.

4. Acute Gastroenteritis

Acute gastroenteritis may be caused by bacterial, viral, or parasitic infections. Poor food hygiene or unclean tableware can lead to such infections. The inflammation may cause fever and congestion or edema of the gastrointestinal mucosa, affecting digestive function. Symptoms may include abdominal pain and dehydration. Treatment may involve medications such as amoxicillin-clavulanate potassium granules, sucralfate oral suspension, and oral rehydration salts III, as directed by a physician.

5. Upper Respiratory Tract Infection

Upper respiratory tract infections are primarily caused by viral infections, such as influenza virus, adenovirus, etc. These viruses not only invade the upper respiratory tract but also affect the gastrointestinal tract via accelerated blood circulation or nerve reflexes, leading to symptoms such as fever and nausea. Other symptoms may include nasal congestion, runny nose, cough, and fever. Treatment may include medications such as ribavirin granules, paracetamol oral solution, and pediatric cough syrup, as advised by a doctor.

In daily life, parents should ensure a proper balance between keeping children warm and allowing heat dissipation, maintain a balanced diet, reduce unnecessary stress and fear, and ensure the cleanliness of eating utensils and food to prevent the occurrence of these symptoms.