my ds was teething from 6 wks
you can get teething powder as said which is herbel remedy and also the bonjela cool is lovely and soothing
found calgel not very affective for my ds
dentinox was great as could be applied every 20 mins had tons of that stuff lol
also end of flannel in icy cold water rubbing on gums is affective
and also calpol or baby nurofen will help