water retention in body The effect of these other flavonoids against oedema has not been well studied. Headache or ringing in ears Diarrhea, stomach cramps or pain Increased thirst , Dry mouth High blood pressure (hypertension). There are two types of congestive heart failure, based on which side of the heart is most affected. What is oedema? , Blurred vision Cerebral edema (osmotic diuretics only). Diabetes. Dependent edema involves swelling of the feet, legs and ankles. , anemia