Antibiotics will only work in the short term. Once the antibiotics are finished, the pain may or may not come back. In cases where there is no apparent pain, the infection may become chronic. Until the cause of the pain is removed (ie the non vital nerve), the infection will remain.
On close inspection, pus may be seen to be draining from the gum. This is a risk of long term damage to underlying adult teeth and compromising to a child’s health.
If for any reason, your child is unable to cope with dental treatment, a referral to a specialist Paediatric Dentist may be required.