The middle toe on my left foot is quite red for the last three days and only painful when i stand on it. the pain is a 5 on a scale of 10. no swel?

Inflammation from?: The redness and tenderness are symptoms of inflammation. Causes of a red sore toe include gout, toe nail infection, or injury. Toenail infections can include the skin near the cuticle. This can make the entire toe turn red. This is something that should be looked at and treated by a physician.

See your doctor: There are a few possibilities including gout and infection. If it is an infection since you're on prednisone, the symptoms can be suppressed and the infection could be quite severe despite the relatively mild symptoms. I suggest seeing a physician fairly quickly