<s>[INST] I have had a red itchy rash on my legs and now my arms for several month, I have pain in my legs and sometimes my legs give out. I have been to the doctor several times, they have taken blood, and I ve had a chest x-ray. They don t know what this is. They had me on doxycycline for a week, it got worse, then the dr put me on prednisone for a week. the prednisone helped for a few days then it came right back. Is this Lupus? [/INST] Hi and thanks for the queryI am Dr. Alok and very pleased to be assisting you with your health questions today.it might be lupus, I advice you to go for ANA test. This test is really helpful to rule out lupusHope this helps and provides answers to your question.If you have any further queries, please don’t hesitate to ask me againI wish you good health, take care--Dr. Alok </s>