What are the causes of balanitis?

Patient's question:

My friend has a symptom of itchy glans, it seems quite serious. What are the causes of itchy glans?

Doctor's answer:

Common Causes of Balanitis and Prepuce Inflammation
In individuals with excessive foreskin, the glans penis is usually tightly covered by the foreskin and must be manually retracted to be exposed. The sebaceous glands of the foreskin often secrete excessively. If proper hygiene is not maintained by frequently cleaning the external genitalia, or if cleaning does not involve retracting the foreskin, the secretions can accumulate under the foreskin, forming a cheesy substance known as smegma. This can lead to balanitis. Young people often have high sexual desire and engage in sexual activity frequently. Sometimes, overly rough sexual intercourse can cause varying degrees of foreskin irritation.
Quit smoking and alcohol, pay attention to personal hygiene, and finally, wish all patients a speedy recovery.