The main symptoms of Nutcracker syndrome are hematuria, upright proteinuria, gonadal varicose veins and so on. 1. Hematuria: It is a common symptom, but not necessarily present in all patients. Most of the patients have microscopic hematuria, but also can have microscopic hematuria, which is often intermittent and usually worsens after activity. 2. Upright proteinuria: It is also a common symptom, often occurring when urinating in an upright position, especially the incidence of thin and long body types will be higher. 3. Varicose veins of the gonads: men can develop varicose veins of the left spermatic cord, which can lead to male infertility. Women can develop varicose veins on the left side of the ovary, which may cause lower abdominal pain and menstrual cramps. Symptoms of Nutcracker Syndrome also include dizziness, panic attacks, nausea, etc. If you suspect Nutcracker Syndrome, it is important to seek prompt medical attention and treatment.