The red itchy glans may be caused by glansitis, allergy, condyloma acuminatum and other factors. 1. glansitis: men have a long foreskin, not often wash the inside of the foreskin or have unclean sex, may induce glansitis, due to the glans is stimulated by inflammatory substances, it will lead to glans redness, accompanied by itching. 2. Allergy: for example, the use of poor quality condoms, the glans area allergic reaction, may lead to glans redness and itching, itching is more intense. 3. Warts: a common sexually transmitted disease, usually caused by human papilloma virus infection, can lead to red bumps on the glans area, accompanied by symptoms of itching, the area may gradually increase, and has a strong contagious. The red itchy glans indicates the presence of abnormalities and it is recommended to seek medical attention for examination and treatment.