I have a brown rash on my neck. it doesn't itch or flake.. the majority of the rash is solid brown, it is getting bigger. had it for 2 months. i haven't been in the sun yet as it is still 65 :)?

Brown rash: You have a condition known as acanthosis nigricans. It may be a symptom of polycystic ovaries. See your gynecologist or dermatologist for evaluation and possible treatment.

Brown Rash: Without seeing the rash it is difficult to make a diagnosis. The rash could be a yeast like organism called tinea versicolor. The rash could postinflammatory hyper pigmentation meaning that irritation of the skin caused the dark pigment. The rash could be acanthosis nigricans which is more common n people with diabetes. See your dermatologist for the correct diagnosis.

Need to see to know: This rash would likely need to be examined and more history obtained to be able to provide you with useful input about the diagnosis or possible treatment.