Small white particles on the underside of the crown in men may be due to circumcision, pearly pimples, warts and so on. 1. circumcision: may be the foreskin is too long, resulting in the coronary groove cleaning is not in place, the local skin metabolites or keratin, etc. accumulation in the here, will form white particles. 2. Pearl-like pimples: may be poor local hygiene or infection of the coronal groove, long-term stimulation of the local skin, pearl-like, translucent white pimples. 3. Warts: mostly due to the infection of human papilloma virus, causing local skin mutation, the initial appearance of pink papules, warts are often white or dirty gray. The male crown underneath the small white particles can also be seen in other causes, it is recommended to timely medical treatment, follow the doctor’s instructions for relevant examination, in the doctor’s help to deal with or treatment.