Several things: A swollen lymph node, a goose egg from prior trauma he didn't tell you about, an insect bite that is becoming inflamed. If any of these fit you can monitor it until it either goes away or you decide to have it checked out.
Answered 11/12/2012
5.5k views
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
6 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question