Large lump on Green Tree Frog Throat

[Shelilla]

This isn’t my frog, it’s my dad’s and I don’t care for it but I just happened to notice today that it has developed a large lump on its throat. I was wondering if anyone might know what this is and how big of a cause for concern it is. My dad’s had this frog for around a few years at least. Thanks for any help I can get, I want to make sure this frog isn’t suffering because of this growth or if it is the best course of action to relieve its pain. ):