Redness, swelling and itching of the foreskin as well as increased secretions are considered to be due to glans phimosis, allergies, excessive masturbation and so on. 1. Glans phimosis: due to the stimulation of the foreskin scale and the infection of bacteria, fungi, mycoplasma, trichomonas and other pathogens, it can lead to the occurrence of glans phimosis. Clinically mild can appear redness and swelling of the foreskin, itching, serious and even erosion and oozing, accompanied by purulent secretions. 2. Allergy: For example, if you wear new underwear or unfamiliar brand of condoms, you may occasionally have allergic symptoms, such as swelling and itching of the foreskin. 3. Excessive masturbation: Sometimes the masturbation action is too rough, which can cause different degrees of foreskin breakage. Due to the high degree of mental excitement during masturbation, the damage is relatively small and may not be noticed, but the wound on the foreskin is very susceptible to bacterial contamination, which induces phimosis and produces itching sensation. The redness, swelling and itching of the foreskin as well as increased secretion can also be seen in other diseases, it is recommended to go to the hospital to clarify the cause of the disease, under the guidance of the doctor for treatment.