What causes fluid retention?

Depends. There are a lot of reasons to retain fluid but one of the most common is due to eat too much salt. It's important to limit your salt intake to 1500mg a day or less.
Many things. Most common is salt. Where ever sodium goes, water will follow.

Related Questions

What would cause fluid retention in just 1 leg?

Fluid retention. Fluid retention in just one leg is usually related to obstruction in the venous and/or lymphatics draining that swollen leg. Read more...

What could cause fluid retention and thyroid fluctuation?

Thyroid. Hypothyroidism can cause fluid retention. Sometimes thyroid problems are associated with other autoimmune disorders affecting kidneys. This would cause fluid retention as well. Certain GI problems like celiac disease could also lead to malabsorption which could cause fluctuation in fluid status. Read more...

My mom just had a heart catch done. My sister called and said her ejection fracture is 65, heart functioning well and one side is more stiff than the other. Now I'm confused with all that being said. What could be causing the fluid retention, confusion an

Stiff heart . Likely refers to what is called diastolic dysfunction . This mmeans that the heart does not relax properly when filling with blood(frequently due to hypertension). This is common in elderly especially diabetics. It leads to higher presures in the heart and leads to breathlessness and fluid retention. Read more...
EJection fraction. Ejection fraction 65% is good. But there may be another component, diastolic heart failure which can also produce leg edema, sob, fatigue etc. I presume heart cath was ok. Check with your doctor. Read more...