What's usually recommended for getting rid of mouth ulcer?

Depending on the : Cause of the lesion, most are self limiting and heal typically in about ten days. Symptomatic treatment / relief can be attained using Benzocaine in orabase (available over the counter) or some topical numbing agent. Ask your pharmacy or dentist. If the ulcer is due to an infective tooth related area - see your dentist promptly. Hope this helps.