<s>[INST] My daughter has been ill for about 1 week, as become very swollen in all the joints, cannot eat w/o throwing up, abdominal pains. Blood tests came back and she was diagnosed with Nephritic (or Nephrotic) Disorder. She was taken to the E.R. tonight. I cannot find specific information on this but all of it points to autoimmune and more specifically SLE. What could cause this? She had a baby just 6 weeks ago today. Could it be a temporary situation due to having a baby? [/INST] Nephritic syndrome is associated with loss of protein in urine (causes swelling),increased blood pressure and decreased urine output with some kidney dysfunction.Most comMon cause is infection particularly streptococcal but other causes like SLE may also cause nephritis.As you have mentioned that there is swelling in joint this may happen in SLE and also in infection (infective arthritis).Nephritis usually has no relation with pregnancy or delivery of baby.Regards </s>