The photo attached may not be for the faint of heart. I had a picture taken of my hamstring on day 3 after the injury. It wasn't bruised the first day but typical of any deep tissue injury, the bruise is surfacing more as time goes by.
To be honest, the most difficult thing to do is sit on the toilet. I don't have a handicap toilet so the muscle pulls as I sit down. Then the hard seat pushes on the muscle until I "re-adjust" to a slightly different position.
Eventually my bruise will turn a greenish yellow and go away. Pray for me as I have an active week that I can't get out of and the injury is so close that I could easily re-injure it.