question: I am diabetic and on metformin. I am overweight too. I wore shoes yesterday with no socks and today I wore sandals. My third toe to the right of the big toe started hurting today. Didn t know why. By the end of the day I noticed my toe is very sore and is a purple color. My husband wonders if I dropped something on it. A few days ago a big (100 lb) dog maybe stepped on the toe? I can t remember. No cuts, a little swollen and sore. what to do?