If patients find that their feet and legs are swollen, they should pay attention to elevating both lower limbs at rest, especially during nighttime sleep, to promote reflux. If there is still no improvement, short-term application of diuretic medication, such as hydrochlorothiazide and furosemide, can be used. The main thing is to find the cause of the disease and treat it from the etiology. Swollen feet and legs are very common in clinical practice, and some of them are caused by physiological factors, such as the patient being in a standing position for a long time, especially walking for a long time. In this case, water gathers in both lower extremities under the effect of gravity, and especially in elderly patients the reflux is not very good, which leads to swollen feet and swollen legs. This condition does not require special treatment, and only requires elevation of both lower limbs at rest to promote reflux. There are also pathological factors that cause this, mainly various nephritis, nephrotic syndrome, liver disease, heart disease, and thyroid disease. These diseases can cause edema not only in the feet and legs, but also in other parts of the body, such as ocular edema and pleural effusion, etc. These diseases usually need to be treated with diuretic medications, as well as treatment from the underlying cause.