A man’s crown groove has a circle of small meat grain painless and itchy may be related to pearl rash, warts, genital lesions. 1. Pearl Rash: clinical manifestation is a row or more rows of small meat particles at the crown groove or glans, the size is similar to the pimples, the color is like pearls, usually no pain, no breakage, and the patient does not have obvious self-conscious symptoms. The main reason for this is that the foreskin is too long, do not pay attention to personal local hygiene, did not change the underwear, resulting in secretions and some dirt long-term stimulation triggered. 2. Acute warts: performance is such as papillary small meat grain, single or multiple like cauliflower pattern, the cause is bad sex infected papillomavirus, lesions are located in the coronary groove, the head of the penis, the urethra, and so on. Most patients with this disease have no conscious symptoms. 3. Genital lesions: manifested in the genital area and the coronary groove parts of the appearance of small meatballs, the development is relatively slow, there is no pain and itching sensation at the initial stage, if the breakage will form an ulcer, accompanied by pain. Precautions: If the cause of the disease is not clear, you need to go to the hospital in time to confirm the diagnosis, and cooperate with the doctor for treatment.