Boyfriend has a very large blister on big toe and it popped on it's own. the fluid that came out was brown. the swelling in his foot has gone down.and he can move his toes. i drained it and clean around with an alcohol swab then antibacterial soap.

So far, So Good.: It sounds like you've done all the right things. The brown could be the residue of old blood. You need to check for the signs of increasing cellulitis and infection. Things like swelling, redness, heat and pain. If the wound does not improve with your treatment than a trip to your doctor may be in order. If the sight clears, the congratulations are in order, I think.