Question

A 9-month-old baby has high TSH levels, low FT3 levels, and normal FT4 levels. What could be the cause of this? How should it be handled?

Answer

Based on your description, the baby’s serum thyroid hormone levels show high TSH, low FT3, and normal FT4. This may be due to abnormal regulation of the endocrine system. Generally, when TSH levels are elevated, it stimulates the thyroid to secrete more thyroid hormones, leading to increased levels of FT3 and FT4. However, in your baby’s case, the FT3 level is below the normal range, which may indicate insufficient thyroid secretion or a problem with the body’s response to thyroid hormones. Since the baby is still young, this condition requires close monitoring. It is recommended that you regularly take your baby to the hospital for check-ups to timely track changes in thyroid function. In daily life, you should pay attention to providing your baby with a regular lifestyle, meticulous care and attention, and ensure that the baby’s diet is easy to digest and absorb. Avoid giving your baby any potentially adverse stimulation, such as spicy or greasy foods, as well as alcohol and smoking. Additionally, avoid exposing your baby to secondhand smoke, as the chemical substances in the smoke may affect the baby’s endocrine system. Follow the doctor’s professional advice and adjust care measures according to your baby’s actual condition. If the baby’s serum thyroid hormone levels continue to be abnormal, further examination and treatment may be required.