There are white spots on the glans for half a month without pain or itching, and the possible clinical causes include glans pearl rash, sebaceous ectasia, and dermatosis with pigment loss. 1. glans pearl rash: this condition belongs to the physiological variation, usually manifested in the affected area of the local appearance of multiple pimples, especially in the glans area, pimples present arrangement, multiple distribution along the coronal groove, and will not be accompanied by other uncomfortable symptoms. 2. Sebaceous ectasia: the skin in the glans area has sebaceous gland blockage or exuberant secretion, which may cause local white or yellowish secretion, and this situation needs attention to clean up. 3. pigment loss skin disease: clinically common such diseases are vitiligo, this disease to local or generalized loss of pigment, white spots as a characteristic, and its biggest feature for the affected area is painless, smooth surface and can occur in the whole body. If the symptoms persist or there are other symptoms, it is recommended to go to the reproductive department of the hospital for treatment.