If you're in the middle of the middle, however â not lower or upper-middle class â that would be an income range between $39,764 and $64,582, says Aaron Pacitti, an assistant professor of economics at Siena College in Loudonville, N.Y. Again, it isn't official.
Edema definition and facts. Edema is a swelling, usually of the legs, feet, and/or hands due to the accumulation of excessive fluid in the tissues. The edema that occurs in diseases of the heart, liver, and kidneys is mainly caused by salt retention, which holds the excess fluid in the body.
Any hormone imbalance in your body could also cause edema to accumulate in your legs. Since gravity will always carry the fluid to the lowest part of your body, it is usually first becomes evident in the lower legs or feet. Vein malfunction / vein dysfunction is also another common cause of leg swelling.