text: the habbit of digging nose with fingers may cause hiv infection in social hand shaking practices or not? while digging noses sometimes a slight amount of blood comes out of nose along with nasal fluids and gets rubbed before shaking hands. does it carry any possibility of hiv infection? the possibility is too slim to even worry about...  all one has to do if they're worried about this, and it's good health practice anyway, is to cover with a band-aid any broken skin they may have on their hands...