question: Two weeks ago I was stung by a young yellow jacket on my left inner forearm 2 inches above my wrist. After 10 days of pain and itching, rash and swelling, it finally went away. Two days ago it began aching in the same spot, and it hurts even more when I touch it from the outside but it s not on the skin surface. Tonight it s slightly raised from under-the-skin swelling and the raised surface is about the size of a small egg.