Greetings. I am sorry i can barely understand your question - of what i have understood your brothers legs look as though they are burnt - and there is no problem according to the test . What test was done - do you mean colour doppler for varicose veins? Possibly your brother has pigmented purpuric dermatosis or pigmentation due to venous hypertension ? or other causes need to be ruled out after a direct examination. Please see a qualified dermatologist near you. Hope this helps. Warm regards.
see a qualified dermatologist near you
Further queries and snaps of lesions can be sent on Practo Direct