If a child's immune system does not function properly, it can lead to a series of uncomfortable symptoms that can lead to susceptibility to pathogens. If the immune system is weakened for a long time, it may increase the risk of infections, tumors and other diseases.

1. Common symptoms

1. Frequent colds: When children's resistance is low, bacteria or viruses can easily invade the body and cause upper respiratory tract infections, such as rhinitis, pharyngitis, etc., which may lead to repeated colds in children.

2. Poor growth and development: due to the lack of antibodies and cytokines in children's bodies, and the inability to resist the damage of external harmful substances to their own tissues, it may affect their normal growth and development.

3. Wounds are not easy to heal: If children are in a state of low immunity for a long time, it may lead to damage to the skin and mucosal barrier, which makes it easier for bacteria or other microorganisms to enter the blood to cause inflammatory reactions, resulting in wounds that are not easy to heal.

4. Other aspects: There may also be lack of energy, poor appetite, etc., and even increase the risk of allergies, and some children will also cause thrombocytopenia, nephritis and other diseases due to immune dysfunction.

2. Serious consequences

If children have low immunity all the time, the probability of developing cancers such as leukemia and malignant lymphoma may increase as they age.

Therefore, parents should encourage children to do physical exercise appropriately in daily life, and pay attention to balanced nutritional intake, which will help enhance physical fitness and improve disease resistance. In addition, for children who belong to the susceptible group, they can also be vaccinated with influenza vaccine and pneumococcal vaccine according to the doctor's instructions to reduce the prevalence rate.