To say that Congestive Heart Failure is nothing serious is a lie. With proper maintenance you can live for a long time, but it is very important to to take medication as prescribed and have regular follow ups to see that medications do not need to be adjusted. In the elderly, swelling in the ankles can be common and is often alleviated by raising the feet regularly to assist in blood return. However, with CHF is it VERY important to weigh daily, around the same time of day. It is usually considered best to do so first thing in the morning. If there is more than 1-2 pounds in a day, or several pounds in a week, then the gain is almost certainly fluid retention. This can lead to a very dangerous series of physiological events. In this case, the Dr might prescribe Lasix or something else to help get the fluid off. You do NOT want to wait while rapidly retaining fluids with CHF.