HI.. Don't ignore the discolouration weather it is primary teeth or permanent, it may be sign of non vitality, it may cause infection later on, your daughter still have time to erupt her permanent incisor.

Hi As per x ray it seems there is no abnormality as you see colour change only clinically... Don't ignore it as milk teeth ...if there is infection in milk teeth it also spreads apically and cause infection in permanent tooth bud and risks it's eruption.....so don't think  like this..... Radiological investigation should be fine periodically every 6 months..

Hi mam, as of now no issues if there is only color change. Post 6 months have a dental check up. Lift her upper lip and check for any boils or if she is having pain again its time for her dental visit.