I'm confused, but not scared.
SkinActinic keratosis
Aging changes in skin
Allergy skin prick or scratch test
Allergy testing
Basal cell carcinoma
Birthmarks - red
Cellulitis
Circumcision
Cutaneous skin tags
Dry skin
Fair skin cancer risks can lose its pigment, which is called
vitiligoVitiligo on the face
Vitiligo, drug induced and has no significance other than the way it looks. This can also sometimes result in white
hairHair loss
Hair transplant
Male pattern baldness growing out of it. But pigment doesn't come
backBack pain - low
Back strain treatment, and it seems that you're saying that now there's only a small white
spotBirthmarks - pigmented
Liver spots
Measles, koplik spots - close-up
Mongolian blue spots.
In any case, you're going to have to see a doctor to sort this out. I will tell you, though, that almost certainly you're dealing at most with
fungusFungus
Pulmonary aspergilloma (mycetoma),
eczemaEczema
Eczema, atopic - close-up
Seborrheic dermatitis, or perhaps a pigment problem--nothing serious, contagious, or sexually-transmitted.
See a doctor--that's what we're for!
Take care.
Dr. Rockoff