Penile brittleness if accompanied by penile pain, bruising and even hematoma need to consider penile leucomalacia injury; if accompanied by frequent urination, urinary urgency, urinary pain and even hematuria need to consider the possibility of urethral calculi. 1. Penile leucomalacia: If the penis suddenly crunching in the course of sexual life, and accompanied by pain and even subcutaneous bruising of the penis, hematoma need to consider penile leucomalacia contusion, or even rupture may be needed to go to the hospital in time for treatment, and if necessary, to perform leucomalacia repair surgery. 2. Urethral stones: the presence of stones in the urethra, stone crushing and mutual friction will also appear brittle, the patient is usually accompanied by frequent urination, urinary urgency, urinary pain, and even hematuria, dysuria, ultrasound can be clear, if necessary, need to carry out lithotripsy lithotripsy surgical treatment. Overall, if the penis has a brittle need to pay attention to timely hospital examination, clear cause for targeted treatment.