 [ Symptoms ] what to do when toenail comes off i am a diabetic but my toe nail was getting thick and discolored and it came off what should i do to treat it or should i see my diabetic doctor [ Disease ] see your diabetic doctor or a podiatrist you may have a fungal condition of your nails called onychomycosis but this will need to be confirmed and properly treated not self treated as you know i have no way of examining your feet it is best not to mess with your own nails when you have diabetes