Dear Lybrate user, You are well aware of your child's condition. It is nice to know that you understand the treatment that is required. Once the pulp of the tooth gets exposed, pain
is inevitable and also, the pathway for the infection
to reach the tooth root is open. You should try to get
the treatment done else there will be chances of infection and pus formation. If left untreated, the tooth will get decayed and will need to be removed. It is important to note that the permanent tooth will only erupt around the age of 6 years. Therefore, this tooth should be saved till the eruption of the permanent tooth and hence go for the treatment. Good luck!