A baby’s depressed tongue may be caused by oral ulcers, short tongue tie and other conditions. 1. Oral ulcers: the cause of the disease is not yet clear, mostly considered to be related to genetic, immune, mental, dietary, trauma and other factors. Generally occurring in the lips, tongue, soft palate and other parts, if the formation of superficial ulcers, there may be a baby tongue depression. And some patients may also be accompanied by weakness, low fever, irritability and other systemic symptoms. 2. Tongue tie is too short: it is mainly caused by physiological factors, and it is also related to X-chromosome inheritance. Patients usually have no obvious symptoms, can be manifested as the baby’s tongue tip depression, can also appear breastfeeding difficulties, dysphonia and so on, there are also a few patients may appear swallowing difficulties. It is recommended that parents find the baby tongue tip concave situation, but also need to clarify the cause of the disease, follow the doctor’s instructions to take targeted treatment.