Itching of foreskin is also in several aspects. First, edema can cause itching, and some are infected by candida, fungi, molds and bacteria. Second, allergies, that is, allergies caused by contact with chemicals or alcohol, or eating other drugs, drug allergies. Third, there may be eczema, physical eczema, psoriasis and so on. Some of these patients have eczema, and so do other places. There are parasitic things, such as trichomonas, and parasites on animals. Nowadays, many pets will cause it. There are also bad pants, and some people are allergic to chemical fiber pants. In addition, the other party may have physical problems in sexual life. Women may have problems and itch after using things. See a doctor.