The common causes of earthworm-like hard stripes at the tether include penile lymphadenitis, urethral stones, scar healing after tether breakage, etc., and it is necessary to go to the hospital in time to find out the cause of the disease. 1. penile lymphadenitis: penile lymphadenitis refers to a section of lymphatic vessels in the penis is subject to inflammation, characterized by penile subcutaneous cord-like lumps, histopathology is mainly lymphadenitis, etiology is unknown, trauma, local mechanical stimulation, viral infection, tuberculosis may be a factor in the development of the appearance of the earthworm-like hard strip. 2. Urethral stones: most of them originate from the bladder and the urinary system above the bladder, such as kidney stones, ureteral stones or bladder stones. Stones can stay in the urethra when they are expelled, and when they are dislodged, they can lead to a localized manifestation of hard lumps and hard stripes on the penis. 3. Scar healing after tether breakage: The prepuce tether is located below the urethral opening, at the junction of the coronal groove. The deformed healing of the tethered ligament after rupture will form a scar, and the tethered ligament will be shortened, which looks like an earthworm-shaped hard strip from the outside. There are many reasons for the presence of an earthworm-shaped strip at the ligament, and immediate medical attention should be sought.