What is this? I found some of these things in my scalp there is no pain or anything they just look unnatural (Photo)

I had hair transplant 2 year's ago and Im using min and dutastride for more than 2 years, image is from back of my head and where they harvest hair grafts , hair transplant was successful , i have dry scalp and I was diagnosed with aga before my test lab was normal and dht level was 137 pg/ml. Although I had vit d deficiency but Im using vit d for 6 months to address the issues. Photo is taken with 8x zoom and flashlight on