Whst is growing on my hen

[Cherry girl]

This is a picture of her neck now scabs come off its just Uzi a little bit I just don't know what's going on.

 

[Eggcessive]

Since this has grown so quickly, it could be a sarcoma, a type of cancer. I am not a vet, just an amateur, but you may want to get a necropsy if you lose her, just to make sure. Some viruses in chickens, such as Mareks and leukosis, can cause cancerous tumors.