what could be the cause of red streak on inner arm? She has had this on the other arm approx 3 mo. ago and doc could not find anything......doppler and blood work all neg. 23y/o fem with hx of stable glomerulonephropathy, primary hyperparathyroidism and alopecia areata. Neg for lupus. any suggestions would be greatly appreciated. Her primary and renal docs out of Rush. Concerned Mom