My chicken's red vent, what can I do?

[scrambled please]

Yesterday, I noticed my 7 month old wyandotte hen,setting down and limping when she walked, on investigation, I found a red bump on her vent; I cleaned it and let her roost last night. Today her limp is worse and the red bump seems to be coming from inside of the vent it is the size of a blueberry and very red; I treated with Vaseline and witch hazel and before I do anything else, like kill her or call my vet, I thought I would check here. I also gave her mealworms because she was so sweet letting me probe her. She is eating fine.

 

[Chicken Chat]

Wow, that is odd. Can you take a picture of it? Maybe somebody else has seen this before.

 

[Badbaby05]

Hemorids??