This is Dr. David
can you upload a clear jpg photo of your hand so I can better help you.
are these knobs soft or hard?
do you see the add file link where you can upload a jpg image?
yes, I see those small spots.
they can be small early skin cysts or warts or early molloscum
sometimes viral infections can cause these small spots which can be seen on the hand.
they are not dangerous
you can see a doctor but they will not offer treatment
they can watch the spots.
let me know if you have questions.