Anyone deal with cold sores?

I saw this and it has decent reviews - thinking of trying it for my 6yr old DD who gets them 4 times a year.

Any chance anyone here has tried this?
https://www.amazon.com/gp/product/B003HUP4TM/ref=ox_sc_act_title_1?smid=ASEVS99O6FS73&psc=1