Milk teeth start shedding by 6 years of age and process continues till 12 years. During this time every tooth has its own time to shed. The upper milk tooth molar will shed by 10-12 years of age.
If left untreated, it would start causing pain, swelling, damage the developing permanent tooth above the roots of this milk tooth amongs a few things.
Please visit a pediatric dentist for a check up and treatment for this.
Remember, decay spreads from one tooth to another , it's very important to get it treated before it progresses any further
Next Steps
visit a pediatric dentist