My husband, twice in the past, has experienced swelling with erythema radiating heat on the tops of both feet, some going onto his ankles. He has a very difficult time walking when he has this. Neither time had he had excessive activity or an injury that might have caused it. He woke up it. He has pain also accompanied with this.
Both times he visited the family doctor who told us he really did not know what it was, treated him for tendinitis, did some blood work but found nothing.
My husband is on a couple different antihypertensive medications. Could his blood pressure medicine cause this????