1. Stop rubbing or itching the scalp.
2. Start with basic hair care regimen.
Next Steps
Show a Dermatologist personally asap and get required blood tests done.
Health Tips
Following blog post should be helpful initially :
"Top Causes of Hair Loss and Hair Thinning in Women" by Dr. Jolly Shah Kapadia - https://www.practo.com/healthfeed/top-causes-of-hair-loss-and-hair-thinning-in-women-15052/post
How to Reduce Hair Loss: 25 Easy Ways!" by Dr. Jolly Shah Kapadia - https://www.practo.com/healthfeed/how-to-reduce-hair-loss-25-easy-ways-25454/post