Thanks for answering my questions I was very scared I sandblasted in heavy dust for 3 weeks I wore a blasting hood with fresh air and a n 95 dust mask under that.I wasnt aware of the dangers of the silica dust.I started having loweer lung pains night sweats,The more I studied the web I started understanding more on Silicosis the night sweats go with TB I think Silicosis its self has no symptoms isnt that right I had to quit looking up that stuff I have had Hrct,Ct X ray all have been clear but I still have the pains in lower right lung.Thanks Again For Your Advice