About 2 weeks ago I had bronchitis. Then I developed sciatica which ran down my left leg. I still have sciatica, but now I have a very sore skin issue at the base of my spine, and the bottom of my left foot. The sore on my back began as a red circular shape with four dark red spots on it. It looked like a button with four holes. At some point, the sore weeped a bit and now has scabs on it. The sore on my foot also had red spots. I poked at the sores on my feet until they bled. All the sores are painful.