How long should i wear a band-aid after having toenail removed?

A while...: I recommend patients use a bandage until it stops draining... Or later just for comfort.

Toenail: It depends on if its draining or not but usual for my patients is 7-10 days. Did your doctor give you instructions?

One week: I have my patients soak their toe in epsin salt soaks in warm water twice a day for 7 days with a little antibiotic ointment with a bandaid. After the 7th day, I have the patient place is toe in open air. Plus the sensitivity should be gone by the 7th day.