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The answer is yes and no. Feet and lower leg swelling (edema), is caused by a buildup of fluids in the legs and feet. It doesn't necessarily increase with COPD. It can be caused by lots of other conditions in your body. Heart, circulation, kidneys, blood oxygen, etc. It is best to contact your doctor or medical team if selling is becoming a problem. It can be a sign of more serious conditions. Please contact your doctor. God Bless!