What Causes Itching On Chest After Eating?

For the past two days, I seemed to be experiencing itchiness in the chest area, that is irritating and want to touch the area for temporary relief, which stops it for about 5--10 min, before I have the urge to do so again. I will be honest and say it seemed to start shortly after a trip to McDonalds where the item of food was a big mac, and a soft drink(no fries), and thought immediately it was some sort of heartburn(my first instinct was to get some heartburn medicine, like Prilosec, but wonder of itchiness is even a symptom of heartburn, and may be something completely different. It is mostly appearing in the middle chest area, at or near the surface covering approx. 6 inches of area. I seemed to be more noticeable immediately after eating, while again am not sure if it is related or not. I am not noticing a rash in the area, although am full of body hair in this location. Any thoughts?