hi, i'm 21 years old and i have noticed in my left hand... the finger joins were starting to acke like they got tired all of a suddon, but's only the left hand. i am a new mom, my son is about 10 months old, i do mainly all the house work as i am a stay at home mom. i usually hold things with my left hand and write with the right hand. just typing now my fingers get tired. should i be worried about arthritis or are there any hand exercizes i can do to help in the mean time?