Help with possible prolapsed vent

[Kalstryder]

Have you tested your water?

No

If yes, what is your ammonia?

.25

If yes, what is your nitrite?

0

If yes, what is your nitrate?

5

If I did not test my water...

...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.

Do you do water changes?

Yes

What percentage of water do you change?

11-20%

How frequently do you change your water?

Every month

If I do not change my water...

...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.

I have a 9” (without fins) female comet goldfish that has a red tube coming out of her vent. Can’t find any definitive info on what is happening.
Can any of the experts here help give me some direction?