I  have a light colored rash on my chest and shoulders.  Ive had it for four days  now,  and  it does not seem  to be getting any better.  There is no explanation.... no new foods,  lotions,  etc.... and it doesnt itch.  No cold symptoms  either.  At what point should I  see a doctor?
Hello dear, Welcome to Chat Doctor. I have read your query and understood your concern. Such light colored asymptomatic rash can be due to many reasons like P. tricolor, P.Alba and many more. I will advise you to visit your dermatologist at the earliest so that condition can be controlled in its initial phase before it spreads and involve the other parts of body. Or if possible you may send pics of the lesions so that I can actually visualize them and come to a conclusion. Stay healthy.