why are my feet and ankles darker than the rest of my legs. I was in the military and wore combats boots. I retired from the military in 1993. Since then I have done mostly work that require sitting at a desk. I am married with 2 adult children and I have one grand son. I have been diagnosed with sleep apnea. Snore like a bear ( I have a growth in my right nostril, but all my doctor wants me to do is use my cpap machine).