My Tiger Salamander Has a Lump?

[Jhags7386]

I noticed yesterday when i went to feed my tiger, that he has a large growth on the side of his head. And for the first time ever he wouldnt just devour what i offer him. I feed him gut loaded crickets, as many as he can eat in 5-10 minutes. He is moving around and healthy, soaking himself and destroying all of his cage, per usual. But he wont eat and I am concerned. His cage is always around 65-68 degrees, humidity is 60-70%. What is wrong with him?

 

[Bellabelloo]

Could you add a photo of him please, so we can see ?

 

[Jhags7386]

You can see the swelling

 

[Cliygh and Mia]

Edema?