I have had ducks for over 6 year and I have never seen this before. My drake has a lump on his bill. I had seen a smal lump on his beak before, but that one went away. Now a larger lump has formed and It ISNT going away. I have a feeling its an absess but Im not 100% sure.I have been working on a porcelain/blue dusky project and hes the drake I using in this project not to mention hes a loving pet and Id be really sad if anything happened to him.