What is the situation when the external genitalia hurt like they are being stretched by pubic hair?

Patient's question:

Last night, I felt a bit like stretching the pubic hair when it came to the external genital area pain. When I pressed it with my hand, I felt like there was a lump. Anyway, when I touched that area, it was a bit painful, and it didn't seem like just a simple lump pain. Because it's in the area where the pubic hair ends, no matter how I looked, I couldn't see where the lump was. It's been like this all day, a bit painful with a bit of itching. What could this be? ?? Thank you
First question supplement: What's the difference between ulcers and folliculitis? From a symptom perspective, thank you.

Doctor's answer:

Hello: It is very likely that your condition may be related to folliculitis, so it is recommended that you actively go to the hospital for a check-up to see. At the same time, it is important to actively maintain good personal hygiene. Trichomoniasis vulvitis not only affects a woman's life but can also lead to gynecological diseases. Therefore, it is best to go to the gynecology department of the hospital for a gynecological examination, identify the cause, and then treat accordingly. Pay attention to personal hygiene and keep the skin of the perineum clean.