Condition analysis: Balanitis is mostly caused by the foreskin being too long. The cavity of balanitis is moist, and the smegma and exfoliated epithelial cells are conducive to the growth of pathogenic microorganisms. Suggestions: Erythromycin can be used for balanitis. If the itching is obvious and there is a lot of desquamation, it should be considered as a fungal infection. Therefore, stop using erythromycin ointment and use daxonine or ketoconazole ointment. It should be noted that the foreskin needs to be everted after washing. Keeping the glans dry can help it recover quickly. The short erection time is related to your psychological factors.