Welcome to HCM.
Your itching condition might be "PRURITUS
For control your itching, you can try the following.....
1. Use loose fitting cotton undergarments
2. Avoid to use soap, detergent, deodorant spray..until relieve of your itching condition
3. Avoid scratching on it.
4. Take tablet- ATARAX
25 mg( a Hydroxygine hydrochloride anti histamin) 3 times daily for week (avoid driving and use of fine instrument in this week).
After 1 week you need to visit/ consult a dermatologist