The first time Conor broke into a wide grin while sleeping, his mom, Leslie Lauten, of Los Angeles, was delighted. Since then, the 2-month-old's sleep has been filled with silly faces and grimaces. Is he having an intense dream? Unlikely. "Babies' immature nervous systems can cause twitches, jerks, and expressions while sleeping," Dr. Shahid says. By 6 months, most infants give up the grinning, so capture the funny faces with your camera now!
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If your baby has trouble breathing, or if his face or body twitches uncontrollably, he could be having a seizure. Get emergency assistance immediately.