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Democratic presidential hopeful Sen. Barack Obama D-Ill., shakes hands at a rally at the Adams Center at the University of Montana in Missoula, Mont., Saturday, April 5, 2008 Democratic presidential hopeful Sen. Barack Obama D-Ill., right, reaches over the crowd to take Natalie Pankratz-Osborn 8 months, from Missoula, at a rally at the Adams Center at the University of Montana in Missoula, Mont., Saturday, April 5, 2008 Democratic presidential hopeful, Sen. Barack Obama D-Ill., grabs some fries at the M & M Cafe in Butte, Mont., Saturday, April 5, 2008. Democratic presidential hopeful Sen. Barack Obama D-Ill., kisses Athena Mayahin-Barrett...

excerpted from medhelp; Low oxygen content of the blood can cause blue lips. This can be due to low counts or due to problems with oxygenation of the blood. It would be interesting to know what your blood oxygen saturation is during the episodes. Do they last for very long? If so then your brother may have time to come over to your house to check with a saturation monitor (many EMTs have this equipment). If it is low then your doctor would have to look for sources of low oxygen such as blood clots, sickle cell disease or other...