Well I'm really small for my size and it swelled up really big like the size of a grapefruit. I went to school that day ad didn't notice it until around 10am they did do a cat scan and MRI and X-ray...
About a year ago I was told I have RA after my knee swelled up really big and they did blood work. I only know how RA is caused and it makes my knee sweel and sometimes hurt espically when I play...