Stop! Put the castor oil and neosporin down and make an appointment with a dermatologist. If you do a quick search for "itchy crown" or "crown breakage" you will see me in every thread since 2011. It started with an itch, then breakage, then it became apparent the hair there was just flat out not growing right. The texture felt weird, like it had zero elasticity and was hard. Like you I thought to put my hair in a protective style to grow it out. When I took it out and the area had not grown out, I knew something was wrong.
I went to the dermatologist and he took one look and told me I had a bacterial infection in the area. He could see redness and scaliness at the surface. Do you know I was on antibiotics for 30 days!? That along with Clobetasol ( an extremely strong steroid). He said it was quite common to have Black women come in with scalp problems that have gone untreated for yeeeaaaarsss and have turned into permanent hair loss. Traction alopecia, ccc alopecia, scalp infections, the horrifying list goes on and on. And all due in large part to common abusive hair practices in the black hair community (don't forget everybody ain't on LHCF).
Luckily, after all that my hair is finally growing back. Don't take any chances. We can dye, chop, relax, grow, break off our hair, then grow it back all day. But if you permanently damage the scalp you can never have the hair you want.
Sorry for the long post. I had to pay it forward when I saw your post. Blessings.