 [ Symptoms ] can hot or warm water open skin pores and cold water closes skin pores  i am asking this question because i am told i need to wash my hands in cold water to close my skin pores and keep lead dust or residue from entering my skin pores i have researched this and i find articles that state pores do not open or close to sites that highly recommend to wash your hand with cold water to close the pores and prevent lead dust or residue on your hands from entering the pores i would really like to know the best way to wash your hands to remove lead dust and reside [ Disease ] you get prego the moment the sperm fertilizes the egg but it takes two weeks to show on a preganacy test according to my doctor she may only be late