Hi, I Was Riding A Bike About 5 Months Ago

Hi, I was riding a bike about 5 months ago and the pedal hit my shin and there was a sore. There was a soft scab and a raised bump. As time passed I would scratch the area and the scab would come of and bleed. Months have passed and the scab would come off and there was still soreness and a wound but not dripping blood. I've been putting hydrogen peroxide on a bandage and applying it to the area. It will get dry, a small raised bump will appear and the area is discolored but it never seems to heal and go away. I have had other injuries that have healed and gone away but not this particular sore. Should I go to a pharmacy and ask advise? Or what?