oh~~食甜野...就會痛.......it may be tooth declay la.....
you can try to go to gov clinic......but need to queue.......fee of charge......
if refer to hospital, only several hundreds......more economy
The website for the clinic
http://www.dh.gov.hk/tc_chi/tele/tele_chc/tele_chc_dcgps.html
otherwise, you can go to some doctor(not dentist) to refer you to hospital....
you can only remove that one ga.....it's your own choice.....
but dentist also advice to remove the opposite tooth because the opposite will got some problems after that tooth remove......
hope it's help!!