This is Dr. David
redness in the feet can be due to edema and swelling and poor circulation in the feet and venus status blood pool in the feet
swelling in the legs can be a sign of weakness of your heart.
you should see your doctor right away or go to the ER for evalution of your heart to check for new heart weakness and signs of congestive heart failure causing fluid to back up in your legs and lungs.
you might need an ultrasound doppler scan of your legs to check for poor circulation and even small blood clots.
elevating your legs up at night time above your heart and avoiding excessive salt intake in your diet can help prevent swelling in your legs in the future
let me know if you have other questions.
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