As stated by you that the rash does not produce any symptoms, there is nothing to get worried about.
There are many diseases which may appear as asymptomatic rash in axilla
region like erythrasma
, acanthosis nigricans
, at times even dermatophytosis
may be symptomless. Most of these conditions are treatable. Acanthosis nigricans has less chances of improvement, but it does not cause any other harm on the skin.
Till you visit the doctor, stay relax.
Dr. Ajit Singh Kulhari
MD - Skin & VD