There are many reasons for itchy glans, such as glansitis, allergy, eczema and so on. 1. Glansitis: it can be caused by the long-term stimulation of foreskin scale, bacteria, fungi and other local infections and other reasons that lead to the occurrence of glansitis, due to the chronic inflammation stimulation and thus the phenomenon of itchy glans with small red dots on the glans. At the same time can be accompanied by pain, increased secretion and other problems. 2. Allergy: allergy of the glans can be caused by inappropriate material of underwear, which leads to the phenomenon of itchy glans with small red dots. 3. Eczema: it may be caused by immune abnormalities, environment, allergens, etc., leading to local skin inflammation, local itching and pimples. There are many other reasons can lead to the phenomenon of small red spots on the glans is very itchy, it is recommended that such patients go to the regular hospital, clear reasons, and actively deal with, and strive for early recovery.