I was doing some deads a few days ago and felt some sharp pain in the my traps. It's been feeling sore so I took a look in the mirror today. There's a big red spot, about fist sized, in my upper back by the traps. Although not visable in the mirror, I can feel a small crevasse at the center with raised edges on the left and right sides. If I touch it, there's both dull and sharp pain, but it's not that bad. Does this sound like a pulled muscle, or something I need to see a doctor for?