What does a black spot inside of my virgina mean?

Do you mean vagina?: The vagina is basically skin in a different location. So anything you can get on your skin, you can get there also. It could be a bruise, a mole, or a skin cancer. If it is new, you should see a doctor to get it checked out. If you have had it for years, just check it once in a while and make sure it isn't getting bigger or look different.

Black lesion: It could be a mole or a melanoma skin cancer. Endometriosis and inclusion cysts can look like that too. Better get a gyn checkup.