What ointments can i buy to treat balanitis?

Depends: Balanitis could be due to a fungal, bacterial or other inflammatory causes, you should follow up with a primary care provider to see whether you need a cream such as antifungal or anti inflammatory such as steroids or an oral antibiotic if it is a bacterial infection, you should also keep the area clean and dry and avoid sexual intercourse until the problem is resolved, I hope this helps.