The strip-shaped hard lumps on the foreskin in the coronal groove may be caused by circumcision scar, glans, sebaceous cysts and so on. 1. Circumcision scar: some men have undergone circumcision, which leads to scarring and hyperplasia of the scar tissue after the surgery, usually manifested in the phenomenon of strip-shaped hard lumps. 2. Glans inflammation: due to bacterial or fungal infection stimulation of glans inflammation, not effectively treated, long delay caused by inflammatory nodules, can be manifested as a strip-shaped hard lumps. 3. Sebaceous cysts: some patients due to the coronary groove of the foreskin at the sebaceous gland gland ducts appear blocked, resulting in sebum stagnation can not be discharged to form cysts can also be manifested as a strip of hard lumps. Coronary groove foreskin strip hard lumps can also be seen in other reasons, it is recommended that patients with this symptom, should go to the hospital in a timely manner targeted examination to clarify the cause of the disease, under the guidance of the doctor’s treatment.