A lot of red pimples on the glans and itchy symptoms can be caused by condyloma acuminatum, allergies, circumcision and glansitis and other factors. 1. Condyloma acuminatum: Condyloma acuminatum is a sexually transmitted disease, mainly due to the infection of human papilloma virus, can appear in the glans surface is not smooth cauliflower-shaped lumps, can be accompanied by secretion, and can appear itchy and other uncomfortable symptoms. 2. Allergy: due to the poor hygiene and cleanliness of the glans or poor underwear material and other factors, can lead to allergies at the glans, localized red pimples, accompanied by a sense of itching and a slight pain. 3. Foreskin glans: the accumulation of dirt in the foreskin, triggering bacteria, fungi and other pathogens infection, can trigger the foreskin glans, localized red pimples, or even erosion, ulcers and other changes. There are other diseases, such as eczema can cause red pimples on the glans with itching, need to consult a doctor in a timely manner, under the guidance of a specialist to actively treat, help to alleviate the discomfort symptoms as soon as possible.