Selenium deficiency in children can be managed through dietary supplements or by taking selenium-containing supplements as prescribed by a doctor. It is recommended to consume more seafood, animal liver and kidneys, egg products, and nuts, which are rich in selenium.

The most obvious symptom of selenium deficiency is Keshan disease, primarily occurring in children aged 2 to 6 and childbearing women. The main symptoms of Keshan disease include fatigue, palpitations, pale complexion, and an increased heart rate. Selenium deficiency can also lead to osteoarthritis, characterized by enlarged joints and stunted growth.