Water retention can be treated with some diuretic medications, while water and salt intake should be controlled. Water retention means that excess water is not excreted from the body and is retained in the body, mainly causing the symptoms of edema. This can be treated with some diuretics to promote the elimination of this excess water from the body. The more gentle diuretics are hydrochlorothiazide, while the strong diuretics are torasemide and furosemide. For mild edema, you can use some gentle diuretics; for moderate or severe edema, you can use some strong diuretics. In addition to applying diuretic treatment, it is also necessary to control the intake of water and salt in general. The most important thing is to find the underlying disease and give treatment, otherwise after the diuretic swelling treatment, the patient will have edema again, and the more common causes that can cause water retention are mainly renal disease, liver disease, heart disease, and thyroid disease, the pathogenesis and treatment of these diseases are not the same, only to clarify the specific cause of the disease, and to treat the cause of the disease, in order to prevent the recurrence of water retention. The only way to prevent the recurrence of water retention is to identify the specific cause and treat the cause.