Hello there.
Thank you for asking this question.

The classical symptom of this is extreme itchiness at night. Fungal infection is a common infection as poor hygiene encourages the growth of fungus.

The common one known in candidiasis infection. This fungi normally lives in our intestine and skin. When there is an overgrowth of it, it weakens the body’s immune system causing an infection. Another fungus called dermatophyte may also result in jock itch.

To treat this, I recommend to get an over the counter (OTC) cream. The pharmacist will guide you in buying it. If the itch does not go away within two weeks, I strongly suggest that you consult a doctor. It may be due to treating the wrong infection. Your doctor may take a swab around the affected area and culture it in the lab to identify the organism involved.

I hope this helps you to understand.