The glans is always itchy over and over again, which may be caused by bacterial glans, trichomonas glans, allergic glans and so on. 1. Bacterial glans: the glans is always itchy over and over again may be caused by bacterial infection of the epidermis, the patient may appear glans red, swollen, itchy, visible glans with erosion, and the surface of the inflammatory secretion will appear a little. 2. Trichomonas glans: the glans is always itchy again and again may be trichomonas glans caused by trichomonas glans, trichomonas glans is mainly spread through sexual contact. The performance of the glans has pimples and erythema, can be seen pinhead to corn size blisters, blisters can be expanded, fusion, the formation of mild vesicles, the patient will appear itchy, but also can be accompanied by urethral urethritis symptoms such as urethral urethral urethral urethra red and swollen. 3. Allergic glans: glans is always itchy again and again may also be allergic glans caused by allergic glans, allergic glans is usually related to contact with unclean underwear or condoms. The patient will be manifested as itchy glans, and accompanied by swelling, erythema, small blisters and other symptoms. The itchy glans may also be caused by other reasons, and it is recommended that patients go to the hospital in time, under the guidance of the doctor to clarify the cause and treatment.