Hello,
Thank you for asking at HCM.
I went through your history and would like to make suggestions for you as follows:
1. There are many causes of such itching and
rash. Common causes are exposure to sunlight, sweating over that area, exposure irritant from air, exposure to shampoo/soap, etc.
2. For treatment purpose, I would suggest you to use an antihistamine like cetirizine or
levocetirizine which will control itching.
3. I would also suggest you to apply a lotion such as
calamine lotion over the itchy area.
Hope above suggestions will be helpful to you.
Should you have any further query, please feel free to ask at HCM.
Wish you the best of the health ahead.
Thank you & Regards.