What Causes A Small Wheatish Patch Behind Neck?
previtiligo and nevus dyschromicus are possibilities
Detailed Answer:
Hello. Welcome to HCM.
I have read your query.
I have seen the attached photographs also.
I understand your concern.
As per details, there are following possibilities for the symptoms you mentioned-
1) Pre vitiligo : it is the stage preceeding vitiligo. It is characterised by hypopigmented skin which is totally asymptomatic. It has spontaneous onset and is progressive in nature. It may be noticed anytime when the hypopigmentation becomes appreciable to visualize.
2) Nevus dyschromicus: it is actually a birth mark but present since birth. As you mentioned that you never noticed it before so the chances of being it to be nevus are highly unlikely.
Vitiligo usually has genetic predisposition but family history is not always found.
Treatment of choice is topical sreroids . Other modalities of treatment include tacrolimus, decapeptide growth factors, phototherapy.
You should visit your doctor so that he can do clinical examination of the skin. Wood's lamp examination is helpful in making diagnosis.
You can share my opinion with him.
I hope it helps.
Stay healthy.