My 4 yr old son has been getting hot flashes pretty regularly. he's pretty healthy and not on any meds. should i be concerned and call dr?

Hot flashes?: Is your son having intermittent fevers? Or, does he just feel warm to you? I'd look at the symptoms and situation around the events - if he is acting fine and not complaining of anything I suspect that what you are noticing is normal; however, if you see symptoms or your observation continues have him seen by his pediatrician to ensure that all is well.