What causes itchy rashes on the arms and legs?
Patient: Rash red lines one inch or dotted line of rash itchy, prickly, hot at times. On arms, legs and neck. It started with blister looking now dried up. I thought it was poison ivy at first but then the rash has since started ( after first week ) on both arms and legs and it has been 3 weeks now. Doctor: Hello and Welcome to ‘Ask A Doctor’ service.  I have reviewed your query and here is my advice.  It seems that probably you may be having allergic dermatitis. - Levocetirizine daily at night till the control of itching - Azithromycine once a day for a week - Oral steroids in tapering dose - Avoid contact with suspected allergens  Hope I have answered your query.  Let me know if I can assist you further.