Itchy glans when holding urine may be caused by glansitis, urethritis, glans allergy, prostate disease. 1. Glans inflammation: bacterial, trichomonas, fungal and other pathogenic infection, causing inflammatory reaction of the glans, may cause congestion, swelling, sensitivity abnormalities of the glans, which leads to itchy glans when holding urine. 2. Urethritis: various types of urethritis may cause congestion and swelling of the glans urethral opening, which may also lead to itchy glans when holding urine. 3. glans allergy: glans skin mucosa contact with external sensitizers, caused by allergic reactions, may also lead to hold urine when the glans itchy. 4. prostate disease: prostate hyperplasia, prostatitis, cystic tumor of the prostate, etc., may compress the local nerve, which leads to itchy glans when holding urine. The glans is itchy when holding urine, there may be other reasons, it is recommended to go to the hospital to check the cause of the disease.