I am a 50 year old male, 6 4 , 250 lbs. location New Mexico. I have a round bump, 1 dia., purplish center 3/8 round, red from there out. Located medial side 4 above ankle. Painful to touch and off and on without. It has been there ten days that I know of, and about 10 days ago I remember feeling like a sting or bite in that area in the morning. Bug bite?, do I need to see an MD?