What Causes Dizziness Followed By Goose Bumps And Low Blood Pressure?

Hi my uncle has been having some problems recently. He gets very dizzy and looks like he is ready to topple over. Immediately following the dizziness, he gets goose bumps all over his body even though when I saw him it was over 80 degrees outside. He says that it feels like he is being shocked from the inside. He is a recovering alcoholic and has recently gotten a factory floor job after months of unemployment. The floor can easily get above 100 degrees inside. The skin on his body is drooping- he says he doesn t feel comfortable in his own skin anymore. He also had to stay in the hospital because he almost passed out and when they checked his BP, the diastolic pressure wouldn t stay above 40. What could be wrong? I m afraid he s gonna hurt himself on the job.