Autoimmune conditions can co-exist with ITP so your symptoms of brittle nails, alopecia would fit in provided at least 2 other criteria were fulfilled to diagnose SLE. There are several others such as discoid rash
, malar rash
), serositis, arthritis, blood abnormalities, CNS abnormalities, ANA positive, ACL abs etc so a thorough clinical & lab reports are required before such a diagnosis is done.
Swollen lymph nodes
(if that is what is the painful lump behind the ear) can be a presenting feature in some SLE patients as well.