Brown roofed turtle, I don't know what is happening to my turtle can you provide guidance about her condition

Today I noticed something seems like a piece of meat was coming out of her , I am really anxious for her condition kindly provide any infor relates to this condition

https://preview.redd.it/hla9rm688lde1.jpg?width=3072&format=pjpg&auto=webp&s=53acd6d2306c8e6221c5096c6b44ff268fa34c72