Why Is My Elbow Swollen, Hot, And Yellow In The Middle Of A Bout With The Flu, Suddenly A Hot, Swollen Painful Elbow...no Injury..any Ideas??

In the middle of a bout with the flu, suddenly a hot, swollen painful elbow...no injury..any ideas?? - why is my elbow swollen, hot, and yellow

I came with the flu on Monday. By Tuesday, she wore, 103 temporary chills, headache, muscle aches, cough, sore throat. I stayed in last night from Monday. I got up, only when needed ..... immediately went back to bed. Wednesday morning I noticed that my right elbow hurt. Bizarre ..... I'm in bed, and I know without a doubt that I was not injured. As the day goes on, I noticed a fairly large area, and my elbow was so hot, very swollen and painful to touch. Move the elbow was not much, at least not at first. Now it is moving a little embarrassed to ... stabbing pain shoot. But the swelling and heat, which fascinates me. There is a localized area of infection can be seen. No yellow zones, no red line. Only a great success, swollen and hot. If not the best, I go to urgent care tomorrow. But I'm curious ... If they sound familiar anyone? What is it? My flu is almost gone, still a slight fever and cough.