High red blood cells and mucus filaments in pregnancy urine test may be caused by urinary tract infection and urinary stones. Specific as follows: 1. urinary tract stones: in this case, further ultrasound examination is recommended to observe whether there is the possibility of urinary stones, and the presence of obvious symptoms, such as low back pain, frequent urination, urgency, etc., should also be assessed. Severe urinary stones may require placement of a D-J tube. 2. Urinary tract infection: If the infection is a urinary tract infection, the symptoms of the infection are mild and can be relieved by drinking more water. If the symptoms are more severe, it is recommended that you drink more water to urinate and take broad-spectrum antibiotics. After pregnancy, as the body’s immunity decreases, must pay attention to good hygienic care of the vulvar area, change underwear diligently, but also pay attention to drink more water and urinate more. If there are other discomforts, you need to go to the hospital in time to clarify the specific causes and give symptomatic treatment.