Thanks for writing your query.
After reading your post, I would suggest you that you should also add antifungal and antibiotic as local application in addition to hydrocortisone
You can use local application of antibiotic like gentamycin
and antifungal like miconazole
If pus is present you can get a culture/sensitivity test of the pus done to know the appropriate antibiotic.
Keep the area clean and dry.
If the problem persists, get yourself examined clinically.
I hope this is helpful to you.