You should be immediately going to a nearby hospital Casaulty or emergency room or call the doctor immediately who applied you the bandage /plaster and remove it as soon as possible and removing the bandage would not be at all deleterious as blue colour indicates that your circulation is at risk and toes are cyanosed
Next Steps
Remove bandage urgently so as to remove the constriction of blood flow
And if the toes doesn’t turn pink please show to your orthopaedic surgeon or go to vascular surgeon
Health Tips
Get urgent ultrasonography ie colour Doppler arterial and venous of that affected cyanosed limb