Hi, thanks for your query.
You seem to have fungal infection
in the groin.
This area is more prone to infections because of sweat and moisture.
Home remedy will not help.
You require oral anti fungal medicine along with anti fungal cream by prescription.
for itching instead of scratching with nails.
Maintain proper hygiene and keep the area dry.
You may meet a dermatologist
for exact diagnosis and treatment.
Get your blood sugar levels checked to rule out diabetes
as infection take longer to settle in diabetics.
Wear loose fitting clothes.
Apply anti fungal dusting powder.
Hope this helps you.