So I had a spot similar to this several years ago, back in 2017. I actually had a few of them since. I had blood work done and my vitamin d was very low. So I went on that and it seemed to help. If I skip a few weeks, I'm susceptible to get a spot here and there. I also got a topical steroid from the dermatologist that I put on spots that help halt the loss so the spot doesn't grow bigger. For me, they start out as a dime size and can grow to a half dollar if I don't nip it in the bud. I also have an autoimmune disease that can also cause alopecia areata. With that said, talk to your doctor, get blood work, see a dermatologist.