Could i use tee tree oil after getting toenail fungus laser treatment?

Getting to fungus: Tea tree oil will kill fungus...If it gets to it. The fungus under a nail is most active at the interface between good and bad nail. If the medication does not get to that area it can't kill the fungus. Adequate debridement of the nail is very important when using a topical remedy. The concentration amount of the tea tree oil you are using will also impact its effectiveness.

Yes: It is actually a good idea to use some type of topical antifungal after laser.