This happened a few times to my kids. The first couple of times I asked my MIL about it. She has an Early Childhood Education degree, raised 6 kids, and had an in-home daycare when her kids were little. She has like 3 lifetimes of experience with kids.
As long as the swelling goes OUT, in the form of a lump or bump, your baby is most likely ok. If the swelling goes IN, like a soft spot, take him to the doctor immediately. ALWAYS keep an eye on behaviors. As long as he's eating and playing normally, I wouldn't worry too much. IF something seems off, take him to the doctor immediately.
at 11:00 AM on Sep. 17, 2013