Mysterious Lump?

[Morphkid03]

Some may remember me, some might not due to my absence from the forum for a few months.

As I was feeding Oliver, my 3 year old betta fish, I noticed right under his gill, under his head, was a lump. It's hard to tell, but it looks more like a fluid filled sack then a tumor, but I wouldn't know unless I could touch it.

Oliver's been acting fairly normal behavior-wise, though more shy then average... His appetite is normal, however.

What do you think this is? Will it affect him in the long term? I'll try to get pics asap.

 

[Morphkid03]

Update:

This morning I noticed another, smaller lump on top of the first lump. Any ideas as to what is going on?

 

[WILDER]

All you can really is try a bacterial med if the lumps are filled with fluid.
Make sure the lump don't resemble a cluster of eggs or look like a cauliflower.

Is the betta by himself in the tank, as if they burst they can infect the tank.

 

[Morphkid03]

All you can really is try a bacterial med if the lumps are filled with fluid.
Make sure the lump don't resemble a cluster of eggs or look like a cauliflower.

Is the betta by himself in the tank, as if they burst they can infect the tank.

Thanks. I let him be for one more night and it seems to have pretty much disappeared for the most part, there's still a little lump but it's hardly noticeable... maybe he bumped into something and it swelled? I have no idea, but all seems to be well now.