Hello Dear and welcome
In my opinion you have to take a oral antibiotics
to control the infection this may be due to bacteria along with yeast. In addition to this your have to follow certain steps like:
1. Keep the area dry and in hygienic condition.
2. Wash the area with betadine
solution or fresh water 2-3 times a day.
3. Avoid intercourse till the symptoms completely subside.
4. Do not use any ointment without prescription or your doctor.
Consult your treating doctor and get examined properly and have a course of antibiotics.