Thickening of the bladder wall after electrolysis of bladder tumor may be due to postoperative soft tissue edema, which is normal. It may also be due to other disease causes such as cystitis and urinary tract obstruction. 1. Electrodessication surgery may irritate the local skin leading to edema of the skin, which may be manifested as thickening of the bladder wall, which is a normal phenomenon and does not require special treatment. 2. Cystitis: when acute cystitis or chronic cystitis occurs, the bladder is congested and the mucous membrane is edematous, and the thickening of the bladder wall can often be seen during ultrasound or CT examination. 3. Urinary tract obstruction: due to the obstruction of the urinary tract, it is necessary to exert oneself to urinate, in the long run, the bladder forced urinary muscle will be compensatory thickening to increase the contraction force, and thus this phenomenon will occur. The thickening of bladder wall after bladder tumor electrolysis surgery may also be caused by other diseases, it is recommended that patients go to the hospital in time, under the guidance of the doctor’s treatment.