I've had bad skin colouring on my feet for at least 10 years. I have recently started at the gym (after the rashes started appearing). I have been wearing circulation socks for the last 6 months. I have had an ultrasound on both legs and the left leg's artery is 'squished' below the knee and the right leg is fine. The rashes started appearing around both ankles and have got progressively darker and have spread across my feet and up my legs.