MRI is usually reliable for detecting urethral lesions, but it is not generally used to detect urethral lesions. MRI belongs to a kind of imaging examination, and its scope of examination is relatively wide, especially for the central nervous system, cranial brain, skeletal system, soft tissues, etc. It has good resolution, especially for the edge of the disease contour can be clearly observed. However, MRI is more expensive and can cause some discomfort to patients, while urethral lesions have some symptoms that usually do not require the use of MRI. The common diseases of urethral lesions include urethritis, urinary tract infection, urinary stones, urethral stricture, and urethral injury. In case of inflammation, the diagnosis needs to be confirmed by the results of tests such as urine bacterial culture and routine, and combined with the patient’s clinical symptoms. As for tumors and stones in the urethra and bladder, urethroscopy and biopsy are generally considered to be the gold standard for the diagnosis of diseases in the urethra without the need to use MRI for examination. It is recommended that patients with urethral lesions should be guided by their doctors to choose appropriate and effective examination methods to assist in the diagnosis of the disease and its treatment.