Mommy, hello everyone! A baby of 1.6 months old has a cavity on the c…

Mommy, hello everyone! A baby of 1.6 months old has a cavity on the chewing tooth at the back wall, a small hole right there. We went to the dentist in the general polyclinic, she said we need to treat it and put a filling in. She said to spray in the mouth, forgot which one then nothing will feel and so that the mouth is open, hold something, then we'll treat it. Either you go to a private clinic and they'll do a general anesthesia so the child won't be traumatized, I am very worried, has anyone had this? Please help me.