Hi and welcome to HCM.
It doenst sounds to me like STD
but you should do swab test to rule this out and then you can take apropriate antibiotic. This can be irritation or allergy
reaction too,but as I said i would do some test to verify the exact cause. It can be fungal infection
too. Sometimes men have STD without any symptoms so your partner should be tested too. WIsh you good health.