Hello, I am a 28yr old female, and have a quarter size bump on my stomach. The bump is surrounded with a red splotch, with a hard knot under the skin. The area is very tender and hurts very bad when sitting and walking (basically while moving). I am over weight and recently lost 30lbs. Ihave been applying warm compresses to the area, but thats not working. I'm concerned about in insect bite, although I don't remember being bitten. Please advise. Thank you