Hello and welcome to healthcaremagic forum!
There is nothing to worry about unless you are a diabetic! I suggest you go for a homeopathic
however you havent mentiones if there is any kind of pain, if there is pain along with the swelling
I suggest you to take Apis 200, 4 pills every 3 hours till it subsides. You can stop the medicine after the
symptoms subside. Also keep washing with antiseptic handwash to avoid further infection. but dont
meddle with the area where you got pricked.
Good luck and god bless