My son is 13months old, he is about 27lbs and is in perfect health to the naked eye. For the last 4months he has had swollen lymph nodes on both sides of his neck, running vertically from about an inch below the ear to just above the bottom of his neck. At first notice, there were only 2. Then a week or so later I began to notice more of them. They feel like hard pebbles which do move around a little when touched (they are not fixed in place). They range in size from just small little bumps to one which has me very worried that is about the size of a peanut/coffee bean.
My son has never had a real problems, he had a cold once with the sniffles when he was about 10months old and that was it. His lymphnodes where not swollen at that time.
I took him to his doctor, a family practitioner, and he tried to calm my worries by getting blood work- he ran a CBC and a lead test. I called and asked the results, he said everything looked normal.
I know that I am first time mother, but this seems very strange to me, lymphnodes are generally swollen in response to your body fighting off infection/illnesses/cancers... His have not gotten any smaller since I first noticed them.
What could be wrong with my son? Also are there any extra tests I can have his doctor run to get to the bottom of this mystery?