Hard bumps under the skin of the coronary groove and painful ejaculation, the possible clinical causes are penile perlis, condyloma acuminatum and so on. 1. Penile Pearl Rash: This condition usually does not cause pain in the absence of co-infection, but may cause painful ejaculation if infection exists. Pearly Penile Rash is mainly located in the coronal groove, near the side of the prepuce tie, and manifests itself as a soft or moderately hard granulomatous structure, which can persist for a long period of time. 2. Condyloma acuminatum: this is a common clinical sexually transmitted disease, when the sick people through unclean sexual contact and infection caused by human papilloma virus infection, then may suffer from such diseases. Clinical manifestations of the glans coronal groove or urethral orifice, penis, perineum, perianal and other parts of the papillary or cauliflower-shaped protruding granulation tissue, accompanied by pain and ejaculatory pain and other related symptoms. If the condition persists or tends to worsen, it is recommended to go to the hospital for consultation and treatment.