Almost 1 month after minimally invasive kidney stone surgery, the urine is still red may be caused by bladder bleeding due to the stent tube retained in the surgery, or it may also be caused by residual stones after the surgery, and it is recommended that the patient should consult the doctor in time. 1. 1 month after minimally invasive surgery for kidney stones, if the urine color is reddish or persistent, may be surgically retained stent tube irritation, damage to the bladder mucosa, resulting in bladder hemorrhage, which enters the urine, caused by the urine is red phenomenon. 2. 1 month after the minimally invasive kidney stone surgery, it is also possible that the tiny stones have not been successfully discharged from the body, damage to the tissues of the urinary system, resulting in the phenomenon of red urine. In addition, may also be postoperative secondary infection, it is recommended that the patient timely consultation review, by the doctor to clarify the cause, give targeted treatment.