It seems that you are having scrotal dermatitis
Along with it there is generalised pruritic rash
, it may be either irritant or allergic dermatitis
After thorough history and clinical examination, diagnosis would be possible.
For that , you consult dermatologist
Oral steroid intapperin dose, antihistaminics and antibiotics may be helpful.
Local steroid cream might improve the disease.
Avoid soap bath. Take sitz bath in dettol contatining water.
I hope you got my answer.
Dr. Ilyas Patel MD