What is the edema of instep generally because of?

There are many reasons for swelling and pain in the instep. The most common joint diseases, including rheumatic and rheumatoid arthritis and gout, will cause the swelling of the instep. Hypertension causes arteriosclerosis, and the patient's blood circulation is slow, resulting in poor blood return and swelling of the instep. There are also liver and kidney dysfunction and heart disease. Cardiac insufficiency can also lead to edema of lower limbs and swelling and pain of instep. Another situation is that there is a thrombus in the lower limbs, which will also lead to blocked blood circulation and cause swelling and pain in the instep. So there is swelling and pain in the instep.