Hey has anyone out there have there bursa sac go. Last wed.nite I get off truck after 10 hrs. my left knee has a tender spot on it. I think what is this I never twristed or hit it on anything. I get home and about 8:30 its as big as a baseball. Doctor sats its the same thing Peyton Manning had. Sent me home with antibiotics and told me to stay off it and come back next tuesday. Wondering how long to recover. Funny but I am on Vac. next week. Thats not what I had planned for my week off.