At present, most doctors are very cautious about the use of drugs for patients with inappropriate urinary tract infections during pregnancy, fearing that inappropriate use of drugs may cause malformations. The common drugs used in clinical treatment of urinary tract infections are: 1. Aminoglycosides: such as gentamicin, butylamine kanamycin. These drugs can damage the fetal auditory nerve, which can cause congenital deafness of the fetus, so such drugs should not be used for pregnant women. 2, cotrimoxazole: the use of this drug before 16 weeks of gestation may lead to malformations, such as the use of pregnant women 2 weeks before delivery, may cause neonatal jaundice. Therefore, this drug is only suitable for pregnant women to use in the middle of pregnancy. 3.Furantadine: This drug can cause hemolytic anemia in individual users, but the incidence of this side effect is low. Therefore, the drug can generally be used for pregnant women. 4.Aminobenzylpenicillin: Patients with the disease who are not allergic to penicillin can use it. 5.Cephalosporins: These drugs belong to the safety class. The first generation of cephalosporins (such as cefradin) is less effective. Second-generation cephalosporins are very effective in urinary tract infections, but should be used with caution for those who are allergic to penicillin. 6, quinolones: the current use of the third generation of quinolones are haloperidol, haloperidol, ciprofloxacin and levofloxacin. The quinolones are convenient to use and effective in the treatment of urinary tract infections. However, animal tests have shown that haloperidol can cause cartilage damage in puppies and fetal rats, so scholars generally believe that this drug should not be given to pregnant women and children. During pregnancy, the body systems of pregnant women undergo a series of changes, especially the enlargement of the uterus, which can cause pressure on the ureter and easily lead to hydronephrosis. For some physiological reasons, pregnant women may also develop asymptomatic “gestational bacteriuria”, which is an important basis for the development of pyelonephritis. According to statistics, the chance of pregnancy pyelonephritis in pregnant women is 0.5 to 0.8 percent. Acute pyelonephritis in pregnant women should be treated with intravenous antibiotics, such as penicillin, cephalosporins, erythromycin and lincomycin, which generally improve symptoms after 24 h of treatment and improve after 48 h. If the symptoms do not improve after 72 h, attention should be paid to the appropriateness of the drug dose or type. When the acute symptoms are effectively controlled, change to intramuscular or oral medication as appropriate. At least 2-3 weeks of treatment should be given, and urine culture should be retested 7-10 d after completion of treatment. In cases of poor renal function, the dosage should be reduced appropriately according to the condition to prevent drug accumulation and poisoning. If you do not pay attention to protection after intercourse, it is easy to get a urinary tract infection. Your recurrence on August 7 may be related to intercourse. It is generally helpful to urinate immediately after intercourse for prevention. What you are talking about is “pyelonephritis”. Pyelonephritis usually has fever, do you have it? If not, it may be a lower urinary tract infection. The medication I have mentioned above. It takes 2~3 weeks of treatment. Your previous relapse may be related to the lack of treatment. Whether there is any effect on the fetus, current research has concluded that cephalosporins are a safe class of drugs for pregnant women.