Strange lump on neon tetra

[Human]

Recently this weird bump on one of my fish appeared and I want to know how I can care for it

 

[Human]

Please help as soon as possible, I want to make sure they're okay

 

[Colin_T]

Take a picture of the fish swimming normally in the water so it doesn't change shape when out of water.

 

[Human]

Take a picture of the fish swimming normally in the water so it doesn't change shape when out of water.

Ok I'll do that

 

[Human]

Ok I'll do that

 

[Human]

That's the best photo I could get

 

[Colin_T]

No idea, need clear images that are in focus. Try taking a video of the fish. You can upload videos to YouTube, then copy & paste the link here. If you use a mobile phone, hold the phone horizontally (landscape mode) so the footage fills the entire screen and doesn't leave black bars on each end.