During pregnancy, the weight of women and the structure of their organs will change, and many pregnant women will show hydrocele, in fact, most of them are not harmful to the body and belong to physiological hydrocele, while a few of them are pathological hydrocele. 1, physiological hydrocele refers to the change of hormone level after pregnancy, causing the increase of vascular permeability, resulting in the leakage of tissue fluid caused by hydrocele. Or it is a relative obstruction caused by a relatively large fetus that compresses the ureter. For physiologic hydrops, most of the time, observation is taken and left lateral position is attempted. In the case of secondary infection, which may cause miscarriage, active treatment is needed, starting with conservative treatment with pain medication and control of urinary tract infection. If the symptoms increase further, it is important to consider whether to continue the pregnancy or to terminate it, and if necessary, to place a ureteral stent tube. 2, pathological fluid: urinary tract stones and tumors, etc. For urinary tract stones. If the symptoms are more serious, you can consider indwelling ureteral stent and continue the pregnancy. The more mild ones can be conservatively observed and wait for specific treatment after delivery. For pregnant women with hydronephrosis, first of all, do not over panic, must go to the hospital for examination. Actively treat it, keep your mind during the treatment and actively cooperate with the treatment.