A normal person’s urine test does not contain sugar. If the urine test has sugar (+), it may be caused by the following: 1. If the level of blood sugar is too high, excessive sugar will be excreted from the urine, resulting in a positive urine sugar. 2. If there is a kidney disease, the renal sugar threshold will be lowered, and the ability of the renal tubules to reabsorb sugar will be reduced, which will also lead to excessive sugar having excretion from the urine, resulting in a urine sugar with Plus. 3. If a woman’s renal glucose threshold is also lowered during pregnancy, leading to a decrease in the glomerulus’ ability to filter glucose and absorb it, also leading to excessive glucose having excretion from the urine. Regardless of the cause of urine sugar plus, it is necessary to go to the hospital for further relevant examinations to make a clear diagnosis and targeted treatment.