What causes red lump on back of leg?
Patient: I have a 10 yr old daughter that has been on methotrexate for a few years for RA. She now has a red lump on the back of her leg that is warm to the touch. She does not remember being bit by something and because she scratched it, it is hard to see if there is a bug bite at all. Doctor: Hi...keeping her history of RA in mind we cannot ignore this symptom. I feel that this could be a reactivation of the primary disease. I suggest that you get back to her pediatrician or pediatric rheumatologist. She will need evaluation of estimation of acute phase reactants before considering bug bite or allergy.Regards - Dr. Sumanth