Welcome to HCM
We understand your concerns
I went through your description. I sincerely believe there is nothing wrong with the condition. Consider some of the following. Weather, sweating, underwear, soap etc
These are some of the issues that might cause the projected problems. They might be simple skin irritation or miliaria
. Sweat glands do get irritated often.
Keep the hygiene of the private area for a week or so and see the result.
Hope this clears your query. Available for further clarifications.