Foreskin dirt with white matter sometimes more itchy red swelling is mostly due to anaerobic bacteria or fungal infection caused by glans, you can use antibacterial drugs, antifungal drugs for treatment. 1. anaerobic infections: anaerobic infections caused by glans can be used externally antibacterial ointment, such as erythromycin ointment, metronidazole gel and so on. 2. Fungal infections: fungal infections caused by glans can be used externally antibacterial ointment, such as miconazole nitrate ointment, clotrimazole cream and so on. These drugs need to be used under the guidance of a doctor. In addition, we should pay attention to personal hygiene and cleanliness, and avoid sexual intercourse during the treatment period to avoid cross-infection.