Is there anything I can do to prevent getting a yeast infection?

Ideally, you shouldn’t wash too much, but it’s basically like athlete’s foot in the groin area, so keep it clean and the humidity low. And go see a doctor.

I think it would be better to ask a specialist about something like this. There are people here who are familiar with papa-katsu (compensated dating in Japan), or consider themselves experts, so if your question is about papa-katsu, you can probably get some helpful answers. However, with a question like this, the answers may end up being no different from what you’d get on a general discussion board. The best option would be to consult a specialist—a doctor. I searched online just in case, and found the following information: Daily precautions Candida tends to multiply in warm, humid conditions, so try to keep the area as dry as possible. After bathing or swimming, dry the outside of the vagina thoroughly, and change out of wet swimwear as soon as possible. If you use panty liners or other sanitary products, change them frequently. Wear breathable underwear. When bathing, gently wash the vulva with just warm water to avoid irritation from soap. Use clean underwear and towels every day. To prevent infection, avoid sharing towels and other items with family members. Candida is also normally present in the intestines. To help prevent infection, wipe from front to back after using the toilet. Even if you feel itchy, try not to scratch the vulva, as this may worsen the symptoms or spread the infection.

I think the main thing is to take care of yourself so you don’t get sick. For details, read the instructions for Empecid or consult a gynecologist. This isn’t a medical Q&A site.