Urine test sg also means urine specific gravity, urine specific gravity is an indicator inside the routine urine examination, urine specific gravity actually has a close relationship with the solute concentration of urine. For example, if the solute concentration in the urine is high, the urine specific gravity may be high, if the solute concentration in the urine is low, the urine specific gravity value will also be low. Normally, the normal value of urine specific gravity is between 1.015 and 1.025. However, some physiological conditions may cause the specific gravity of urine to increase or decrease, for example, when drinking too much water, the urine will be easily diluted and the specific gravity of urine will decrease, if drinking too little water and sweating more, the specific gravity of urine will increase. In addition, pathological factors can cause an increase or decrease in urine specific gravity, such as reduced reabsorption when renal tubular function is damaged, which can lead to renal glucosuria or renal amino acid urine, which may cause an increase in urine specific gravity. In addition, diabetes mellitus can also cause an increase in urine specific gravity, and renal failure and uremia can cause a decrease in urine specific gravity.