I am experiencing rash (quality: itchiness, blisters, bumpy, red or bluish purple) itching on the side of my left foot. Small bumps/blisters?

? Herpes Zoster. It is not feasible to provide a meaningful opinion without examining you and your symptoms warrant evaluation by a physician. What you describes suggests herpes zoster. It should subside in a week to ten days, if it does not, it would prudent to see a doctor.