Yes you can put stitches in your heel.
You'll probably have a bad scar, you may have a slight infection. you might want to see a doctor again if you haven't already.
There should be no difference as the number of stitches doesn't change. I use four needles up to the point where I start the instep and divide for the heel, then I change to three, one for the instep and two for the heel, but only because I find it easier to follow my pattern for the decreases once I finish the heel.
Stitches
The left heel was Achilles week heel.
back stitches, machine . running stitches
i think we have 200,900 stitches
what are the 12 kinds of stitches
The doctor will remove my stitches in three more days. That comedian's stories kept us in stitches! The seamstress stitches patches today!
A row if stitches or a clump of stitches are some collective nouns that could be used.
Simply stitches
running stitches