Greetings! Yes avoid using soap. Be careful while using hair removal creams and loitons - especially in private parts - there could have been an irritant reaction. You must firstly - do some icing of the area for relief and can apply calamine if the area is not raw. Also pls see a qualified deramtologist near you for further examination and evaluation - to check if - u need a mild steroid based cream for improvement of the lesion. Warm regards, Dr Govind, Bengaluru