Men with vague pain near the left side of the bladder, consider that it may be caused by ureteral stones, urinary tract infection, varicocele and so on. 1. Ureteral stones: the left end of the ureter stones will be due to stone stimulation, resulting in ureteral spasm, the left side of the bladder pain, accompanied by frequent urination, urinary urgency, lumbar pain, and hematuria; the need to do ultrasound or CT to clarify the specific location and size of the stone, drink more water, more exercise. 2. Urinary tract infection: mainly acute cystitis caused by pain, is due to the stimulation of inflammation caused by frequent urination, urinary urgency, urinary pain, you can check the urine routine to clarify the diagnosis, take anti-inflammatory drugs for treatment, drink plenty of water, eat a light diet, pay attention to perineum cleanliness and hygiene. 3. Varicose veins: Varicose veins are caused by venous return obstacles, the left side of the varicose veins will lead to bladder groin area tugging pain, need to do scrotal ultrasound for a clear diagnosis of mild symptoms do not need special treatment, you can elevate the scrotum, lying down and resting to ease the symptoms; if it affects the life or affects the reproduction, you need to surgical treatment. If you have any symptoms of physical discomfort, you should go to the hospital in time and consult your physician for guidance.