Bruise on the inside of the big toe knuckle?

Josh16

Barefooters
Jul 2, 2014
208
302
63
35
Val-d'Or, Quebec, Canada
Hey all,
I went running yesterday and after about 1.5 km, I began feeling pain on the inside of the foot where my big toe where the knuckle is. I kept running but since the pain didn't quickly subside, I stopped and started walking. The pain subsided shortly after. I ran slowly the last 50 meters to get home and didn't feel any pain.

Now this morning, I have what looks like a purple bruise in this area. Any one has an idea what it might be?

PS If it's not clear what area I'm describing, I can post a picture.