Most people who have stones in their bladder have no symptoms and may experience lower abdominal pain, difficulty urinating, interrupted urination, hematuria, and urinary tract infections. When the stone falls into the bladder, it will obstruct the urine discharge and irritate the bladder wall, which will result in lower abdominal pain, difficulty in urination, interruption of urination, hematuria, urinary tract infection and other discomforts. 1. Lower abdominal pain: most obvious during urination, often radiating to the head of the penis and the distal urethra. 2. Difficulty in urination: interruption of urination and pain may occur, pediatric patients often rub and pull the head of the penis, after changing position, the symptoms are relieved and can continue to urinate, the larger the stone this symptom is more significant. 3. hematuria: often manifested as terminal hematuria, mostly due to mucosal injury, at this time can be detected in the urine red blood cells. 4. Urinary tract infection: the stone is located in the bladder diverticulum, often without the above symptoms, only manifested as urinary tract infection. Leukocytes are often elevated in urine examination. Bladder stones are prone to secondary infections, so patients may have pus urine, and when the infection is serious, the original symptoms are aggravated. Very few cases can cause ureteral hydronephrosis or pyelonephritis, or even cause renal hypoplasia. Bladder irritation caused by stones and secondary chronic inflammatory reactions can also lead to more serious complications such as squamous epithelial carcinoma of the bladder. If you suspect that a stone has fallen into the bladder, you should consult a doctor as soon as possible for a clear diagnosis and follow the doctor’s instructions to avoid adverse consequences.