My son had a severe allergic reaction after taking medicine for sudden pain in his leg joints. He developed red, painful dots all over his legs, resembling severe mosquito bites, but without any purple spots. The doctor initially suggested the possibility of vasculitis, but his blood report, including a rheumatoid factor of 8.5, came back negative. I am unsure about the cause of this reaction. Some doctors advise that it will resolve on its own, as additional medications seem to worsen the condition. Please guide me on what steps to take next.

Answered by 1 Apollo Doctors

Dr Dhankecha Dineshbhai

General Practitioner

MBBS
6+ Yrs

Consult Now

If symptoms are mild and improving, this could be a self limiting allergic reaction. Vasculitis seems unlikely given normal blood tests. Monitor symptoms and avoid further triggers. Rheumatoid Factor ranges are normal, the doctor would suggest antihistamines.

Dr. Dhankecha Suggests...

Take a CBC+ESR Test or Take a ANTI NUCLEAR ANTIBODY (ANA) Test

Book CBC+ESR Test Book ANTI NUCLEAR ANTIBODY (ANA) Test

Answered 29/08/2025

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