Looks like a cold sore. If it is actually a cold sore. I’d then ask for anti virals from your doctor.
Also bee propolis (if you’re not allergic to bees) is good too for healing/getting rid of cold sores super fast. I use this one: Ys Bee Farms, Bee Propolis Super... https://www.amazon.com/dp/B00028NCVO?ref=ppx_pop_mob_ap_share
A little goes a long way and dilute with water when applying as it can be very drying but very effective.
Also lysine pills can help too.