<human>: Hi I have a rash on my arm and chest only and only on the right side of my chest. They look like raised red bumps and now are starting to scale over on my arm looking violet in color. I am brown skinned so the red shows up but now that it is drying up it is looking purplish in color. There is a bit of an itch too on my arms and chest area where the rash is. This occurred about 3 weeks ago. What is it?
<bot>: HiT hanks for posting on ChatDoctorThe rashes you describe could be caused by two possible thing:-Shingles(zone varicella). Zona rashes occur only on one side of the body, may be very painful and evolve as you describe. Occur only on one side of the body and do not cross to the other side.-Another possibility is reaction to a bite even though less likely. If caused by a bite that may give rashes as you describe, a more systemic response will be expected. I will suggest you see the Doctor to confirm diagnosis. If shingles, your Doctor may prescribe acyclovir tablets and cream to help you get over faster. You may take an anti-histamine like loratadine for itches. Hope this will help Best regards