Guppy blood on her side and very large

[CaraElise]

I have a fish that, with 6 other girls ate a few worms about 6 months ago as we bought shrimps that gave us tge worms and whatever else. Anyway she now has a big blood spot on her side and looks like she is going to explode, help

My tank has 0 Ammonia sometimes low level result. No nitrite and low nitrate. PH is 7.6

Edited July 12, 2021 by CaraElise
added tank info

[Colu]

Have you got a better picture it's difficult to tell what's going on that picture

[Dwayne Brown]

Could you post a better picture? Also do you have anything else in your tank besides the guppies and shrimp?

[CaraElise]

Sorry it's really difficult to get the shot. Can you see now. I have done one from above and another from the side. I did treat the tank for worms but I think they are too many of them, help

[CaraElise]

Just guppies now as the shrimp died. I have three tanks. This tank has been going for 9 months. I have two female tanks and one male. Cory catfish in my other female tank. 

[Colu]

It's has pinecone apprance  it's more then likely has dropsy the red mark could be a secondary bacteria infection I would Qarantine and treat kanaplex and aquarium salt 1 table spoon for 2 gallons the salt will reduce fluid buildup