Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
You have classical symptoms of a condition called balano-
posthitis in which there will be itching,
redness, inflammation and swelling of head that is glans of penis.
I would advise you teh following in such a situation:
Clean the area with plain water often.
Apply Liquid
Povidone Iodine locally.
Check for blood sugar as this may be the first symptom of
diabetes.
Consult your Doctor for a prescription based antibiotic and
Metronidazole prescription along with probiotics and multivitamins with mineral.
Use condom.
If your partner has similar problem both of you have to get treated together and abstain from sex for about 10 days.
Hope I have answered your query.
Let me know if I can assist you further.