How Can Big Toe Pain With Pus, Hardness And Swelling Be Treated?

Hello, i have lots of pain in my big toe,this is going for years now, drs told me that i have a cyst, it comes and goes with lots of pain,sometimes it bursts and a gelly liquid comes out, today there is no liquid, its very hard, swoolen and very painful. i am with acute back pain aswell, HAD back surgery spinal fusion, 8 yrs ago, i have been in a lot of pain for the last week,