Brown spot on male (?) budgie cere

[Mm6393]

So I've had my male budgie for a while now. He's 2 and his cere changes from light blue/purplish to dark blue. A few weeks ago I took him to the vet for a runny nose and a dark spot that appeared on his cere. The vet treated for the runny nose and the cere was blue again. However, as I put him to bed earlier, I noticed the brown spot came back but no runny nose. The vet isn't going to open again until Monday but I was wondering if anyone knew what it meant. I'll post a pic. ***however, the pic I'll post was taken BEFORE I took him to the vet when he still had a runny nose. Now, he has no runny nose but that same brown spot is back***

Thank you

 

[ParrotLover2001]

Infection, maybe?
Did the vet say anything about it last time you took him?

Sent from my Galaxy s8

 

[Teddscau]

Not trying to freak you out or anything, but he may have iodine deficiency or testicular cancer. Those are just two of the possibilities.