The lack of strength in urination is usually caused by prostate diseases, weak bladder muscle contraction, bladder prolapse and other reasons. 1. Prostate diseases: such as prostate hyperplasia, prostatitis, can lead to urine without strength, urinary weakness, incomplete urination, urinary divergence and other symptoms. 2. Weakness of bladder muscle contraction: common causes include cerebral hemorrhage, cerebral infarction, spinal cord injury, diabetes, etc. These diseases can lead to weak bladder muscle contraction. These diseases can lead to dysfunction of the nerves innervating the bladder contraction, and there is no strength in urination, which is manifested as weakness and difficulty in urination. 3. Prolapse of the bladder: this can lead to a decrease in urinary pressure, manifested as weak urination, which is mostly seen in people who are older. There may be other reasons for the lack of strength in urination, and patients need to consult a doctor in time and follow the doctor’s instructions for examination and treatment.