the vaccine is not perfect unfortunately so yes you can still contract the disease later in life if you did not mount an protective response from that one pediatric vaccine. your description of the little red bumps on your arm is just too vague for me to even guess if chicken pox is a consideration. you would need to have a medical professional look at those bumps first-hand.
can you contract chickenpox if you've had the vaccination? . i had the vaccine for chicken pox when i was little and never contracted it. however now a whole bunch of little red bumps are popping up all over my arm and the each really bad. i don't own a thermometer and with it being so hot out i can't tell if i'm running a fever. i had a sore throat a couple of days ago but it quickly went away. i'm rarely hungry which isn't uncommon for me and i'm always tired mostly from school and work. is it possible that the red bumps are chickenpox?