I have a small black lump on my clit. It becomes irritated and hurts. It has also started to itch. I have also been losing more head hair than usual.?

Must see MD. No, not must see TV but an MD to assess your situation and determine outcome.
Discoloration. A new discolored area in the vulva needs to be checked out. You need to see the Gyn for possible biopsy but at least for a doctor to view the area .