What are the reasons for itching inside the root tube during penile erection?

Patient's question:

Patient Age: 32 years old
Detailed Condition and Purpose of Consultation: I would like to ask, my foreskin is a bit long. Recently, during both daily activities and when my penis is erect, I feel itchy inside the root. It becomes soft shortly after, and my libido has also decreased. Additionally, my discharge has increased compared to before. This has been going on for about a month. I would like to know what the cause is and whether it is a serious condition. Could any doctor please provide an explanation as soon as possible? Thank you!
Duration of Current Illness and Persistence: It has been more than a month.

Doctor's answer:

This is a case of perineal itching, which typically does not cause redness, swelling, rashes, or other symptoms and is usually allergic. If it does not improve over a long period and recurs frequently, it may be caused by chronic fungal inflammation. First, maintain cleanliness and dryness, and apply medications such as miconazole for treatment and observation.
Suggestions: Pay attention to personal and environmental hygiene, keep the skin clean, avoid alcohol and spicy or irritating foods. Actively treat underlying conditions such as diabetes, and for frequent occurrences, consider antibiotics and vitamin supplements. Local treatment.