Gamot ba sa singaw ang tawas? Pwede nga ba ang tawas sa singaw?

Tawas sa singaw? We practice using such in the family BUT only when the mouth sore/ ulcer (or "singaw") is still new or a day old. Can say that the effect is not significant and I swear it hurts like hell when you damp some on the sore itself. So afterwhich, we gargle Bactidol or Betadine gargle in the next 2-3 days. Upon checking online, this too can be an effective remedy to mouth/ canker sore: http://wholelifestylenutrition.com/health/naturally-get-rid-of-canker-sores/