Ever since the birth of my son, who is 18 months old. i have had frequent headaches. almost daily. never had many of thembefore. should i be concerned?

Prob. ok, see neuro: Migraine are the most common cause of chronic headaches, particularly in young otherwise healthy individuals. Migraines can be influenced by hormones, and sometimes the hormone changes in pregnancy can bring on the chronic migraines. The fact that you say never had many before suggests that you had some prior to the pregnancy. A neurologist can do a good evaluation and get you on the right meds.