Men with pimples at the coronary groove may be caused by warts, pearly pimples, and glans phimosis, among other factors. 1. Condyloma acuminatum: Condyloma acuminatum is a sexually transmitted disease, mainly due to the infection of HPV (human papilloma virus) infection, can occur in the coronal groove, glans, prepuce tie, urethral opening and other areas, the localization can appear more than a number of papillae, cauliflower-shaped lumps, can be ulcerated, vesiculation, infection and so on. 2. Pearly papules: due to local stimulation or physiological development and other factors, pearly penile papules may occur, may appear in the penile coronal groove and other parts of the pearly, translucent papules, usually not accompanied by other uncomfortable symptoms. 3. Puniculitis: Pathogen infection or excessive stimulation can cause puniculitis, can appear in the coronal groove, glans and other parts of the mucous membrane edema, pimples, vesicles, ulcers and other manifestations. Men who have pimples in the coronal groove should consult a doctor in time, under the guidance of specialists and active treatment, which will help to alleviate the uncomfortable symptoms as soon as possible.