I have been having a pain in my elbow right in the middle back near the pointy tip. It feels like a bruise but there is no discoloration. It doesn't hurt all the time, only with I put pressure on it, especially at night when I am rolling over in bed and I push my body up on my elbow, or anytime I am sitting at the table and prop my elbow on the table. The pain is sharp and moderate to severe but stops as soon as I lift it off of the bed or table. It also hurts if I press on the area. I exercise 6 days a week doing aerobics with arm movements and I also lift weights 3 days a week, the heaviest weight being 12 pounds. I am a 47 year old woman.