Location is at the knuckles, and where my Finger
s bend, but at the moment all along my right <span style = 'background-color: #dae8f4'>Index</span> <span style = 'background-color: #dae8f4'>Finger</span>
on the side closest to the thumb too.
It starts as a blister like thing, with a reddish/brownish tiny dot inside.
Size varies, can be really small as in the picture, or a whole hoard of bumps that seem to merge (whole side of my Finger
When it's in the blister stage it hurts a little, and quite a bit when I bump into the wall or something.