Baby is 50 days old, there is a dark-skinned line below the mouth, I would like to consult about this line.

Patient's question:

Baby is 50 days old, with one dark-skinned line below the corner of the mouth.
I want to ask what is the reason for this dark-skinned line.

Doctor's answer:

The cause of the symptoms you mentioned is primarily considered to be due to the possibility of glossitis or oral inflammation. For such issues, it is recommended to apply iodine glycerin externally and observe the results. Additionally, it is important to have an appropriate dental examination.