..ache In Arm Why Does My Arm Ache, And My Shoulder Hurts After Getting A Bug Bite, Idk What Kind Of Bug But Its Awful?

Why does my arm ache, and my shoulder hurts after getting a bug bite, idk what kind of bug but its awful? - ..ache in arm

my hand is a little too steep. It was dark and I was on the east coast, a lake nearby.