What does it mean if urine specific gravity is high?

Urinary specific gravity refers to the ratio of the weight of urine to an equal volume of pure water. High urinary specific gravity may be associated with factors such as insufficient fluid intake, high-salt diet, fever, diabetes, and acute glomerulonephritis. Patients should visit a hospital and receive symptomatic treatment under medical guidance. The analysis is as follows:

1. Insufficient fluid intake: When the body lacks adequate water, overall fluid volume decreases, leading to a relatively higher concentration of solutes in the urine, which increases urinary specific gravity. This condition generally does not require special treatment and can be relieved simply by increasing fluid intake.

2. High-salt diet: Excessive salt intake increases the burden on the kidneys, raising the salt concentration in urine. The kidneys respond by concentrating urine to excrete excess salt, thus increasing urinary specific gravity. It is recommended to reduce dietary salt intake, consume more fresh vegetables and fruits, and maintain healthy lifestyle habits.

3. Fever: Individuals with poor physical health may develop symptoms such as high fever and cough following viral infections. The body loses significant amounts of fluid through sweating during fever, resulting in concentrated urine and elevated urinary specific gravity. Patients are advised to follow medical instructions for physical cooling methods such as wiping the body with a damp towel, and to promptly replenish fluids to restore fluid balance and lower urinary specific gravity.

4. Diabetes: Diabetes is commonly associated with factors like obesity and genetic predisposition. Increased glucose levels in the urine raise its osmotic pressure, leading to higher urinary specific gravity. Symptoms may also include excessive thirst and frequent urination. Patients should follow medical advice and use medications such as insulin injection, gliclazide modified-release tablets, and metformin tablets to control blood glucose levels.

5. Acute glomerulonephritis: Acute glomerulonephritis is usually caused by streptococcal infection. It impairs the filtration function of the glomeruli, affecting the kidney's ability to excrete acidic substances, thereby increasing the concentration of acidic components in urine and elevating urinary specific gravity. Prompt medical treatment with medications such as furosemide tablets, hydrochlorothiazide tablets, and triamterene tablets is necessary according to physician instructions.

In daily life, patients are advised to quit smoking and alcohol consumption promptly, ensure adequate rest, and avoid chronic sleep deprivation.