A little itchy inside the foreskin may be a symptom due to the occurrence of unclean sex, or glansitis, phimosis and other reasons. 1. unclean sex: unclean sex may lead to chlamydia, mycoplasma infection, which will appear red, swollen and painful phenomenon inside the glans. 2. glansitis: infrequent cleaning, often wear some tight underwear or excessive dirt in the coronal groove can cause inflammation, such people can also be manifested in the glans red, swollen and painful, painful urination and other phenomena. 3. Hyperemesis gravidarum: it can be manifested as the urethral opening and the head of the penis can be exposed, and the glans can not be completely exposed after erection, the dirt in the coronal groove of the hyperemesis gravidarum is easy to hide, which leads to bacterial hyperplasia and thus inflammation, and therefore can lead to redness, swelling, itching and other phenomena inside the foreskin. To summarize, if the foreskin inside a little red itching should be timely medical treatment.